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Best Timing Management Products - Buying Guide

Last Updated: 11/21/2018

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  #1

Texas Instruments NE555P Single Precision Timer (Pack of 10)

Model: ne555   |    Mpn: NE555P   |    Ean: 6921049593039   |    PartNumber: NE555P   |   Asin: B00K243MIQ

These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor. The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground. The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.

Features

  • Timing From Microseconds to Hours
  • Astable or Monostable Operation
  • Adjustable Duty Cycle
  • TTL-Compatible Output Can Sink or Source up to 200 mA
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Brand: Texas Instruments   |   Manufacturer: Texas Instruments

Package Dimensions: 0.39 x 1.57 x 2.17 inches (1.0 x 4.0 x 5.5 cm)

Amazon Price: $4.90 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $5.45

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  #2

R.W. Beckett Corp. 2184404U Cleancut Pump W/Pd Timer

Model: 2184404U   |    Mpn: 2184404U   |    Ean: 0041520876522   |    PartNumber: 2184404U   |   Asin: B008HORUSG

2184404U, R.W. Beckett Corp., 2184404U CLEANCUT Pump w/PD timer

Features

  • 9 watt power consumption; 120 VDC voltage; 115 F max ambient temperature
  • Operating Fluids: #2 & lighter fuel oils; viscosity: 1.4 12 cSt; 32-77 F in the pump
  • Nozzle Pressure: 100-200 psi
  • Suction height: one pipe 8 max. two pipe: 14 max.
  • UL, CUL certifications
  • See more on Amazon...

Brand: R W Beckett Corp   |   Manufacturer: R.W. Beckett Corp.

Item Dimensions: 8 x 6 x 10 inches (20.3 x 15.2 x 25.4 cm)   |   Package Dimensions: 5.5 x 6.1 x 6.2 inches (14.0 x 15.5 x 15.7 cm)

Amazon Price: $67.13 | as of 11/21/2018(4:47am pst)
Availibility:
List Price: $74.95

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  #3

25 PCS, NE555P Timer IC, NE555, 555 by Tech Express

 Ean: 0645688583553   |   Asin: B074Z2PF5X

The NE555 are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or mono-stable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the a-stable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor. The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground. The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.

Features

  • Timing From Microseconds to Hours
  • Astable or Monostable Operation
  • TTL-Compatible Output Can Sink or Source Up to 200 mA
  • Adjustable Duty Cycle
  • Operation is specified for supplies of 5 V to 15 V
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Brand: Tech Express   |   Manufacturer: Tech Express

Item Dimensions: 0.47 x 0.47 x 4.92 inches (1.2 x 1.2 x 12.5 cm)   |   Package Dimensions: 0.39 x 1.34 x 6.26 inches (1.0 x 3.4 x 15.9 cm)

Amazon Price: $10.25 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $10.25

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  #4

R.W. Beckett Corp. 51771U 51771U Beckett Igniter A AFG 621943

 PartNumber: 51771U   |   Asin: B008HORXOW

51771U, R.W. Beckett Corp., 51771U Beckett Igniter A AFG 621943

Features

  • Brand: Beckett
  • Product Number: 51771U
  • SOLID STATE IGNITOR ASSEMBLY FOR BECKETT A, AF, &
  • Category: HVAC
  • Free Shipping on this item!
  • See more on Amazon...

Brand: R W Beckett Corp   |   Manufacturer: R.W. Beckett Corp.

Package Dimensions: 4.09 x 5.75 x 9.17 inches (10.4 x 14.6 x 23.3 cm)

Amazon Price: $36.47 | as of 11/21/2018(4:47am pst)
Availibility:
List Price: $41.85

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  #5

STMicroelectronics M4T28-BR12SH1 Battery Replaces, IC, BATTERY/CRYSTAL SNAPHAT, SNAPHAT-28, M4T32-BR12SH1

 Ean: 0025314626128   |    PartNumber: M4T28-BR12SH1   |   Asin: B01N0RNFTP

Replacement Part: STMicroelectronics M4T28-BR12SH1 Battery Replaces St Microelectronics 497 3686 5 ND 497-3686-5 49736865ND M4T32-BR12SH1 Interstate ALIT0451 GE 197230 AS-3 AS-5 SRAM Datex-Ohmeda 197230 AS-3 AS-5 SRAM

Features

  • Provides battery backup power for serial real- time clock, non-volatile TIMEKEEPER and supervisor devices in the 28- or 44-pin SNAPHAT SOIC package
  • Snaps directly onto surface-mounted SNAPHAT SOIC
  • Capacity: 48mAh , Frequency Load: 32.768kHz
  • emovable battery avoids heat associated with surface-mount process
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Brand: STMicroelectronics   |   Manufacturer: STMICROELECTRONICS

Package Dimensions: 1.1 x 2 x 2.5 inches (2.8 x 5.1 x 6.4 cm)

Amazon Price: $11.25 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $11.25

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  #6

Sci-Supply SS77658-20 Sci-Supply Bulk Stopwatches (Pack of 20)

Model: SS77658-20   |    Mpn: SS77658-20   |    Ean: 0002394295123   |    PartNumber: SS77658-20   |   Asin: B077BWDY8X

Sci-Supply bulk stopwatches, package of 20. These convenient and economical stopwatches are durable and dependable. Lanyard and button cell battery are included!

Brand new model for 2018 (August 2017 Release). These are fantastic economy stopwatches!

Features

  • Sci-Supply Bulk Digital Stopwatches, Package of 20
  • 1/100 Second Readout
  • Split/Lap Time
  • Highly Visible Yellow and Black
  • Battery Included (AG8 Button Cell)
  • Lanyard Included
  • See more on Amazon...

Brand: Sci-Supply   |   Manufacturer: Sci-Supply

Package Dimensions: 2.8 x 8.3 x 9.5 inches (7.1 x 21.1 x 24.1 cm)

First Available: 2017-11-11

Amazon Price: $64.11 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $64.87

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  #7

ICM Controls ICM318 Defrost Control, Goodman B1226008, ICM W1001-4

Model: ICM318   |    Mpn: ICM318   |    Ean: 0800442000077   |    PartNumber: ICM318   |   Asin: B008HQ3LNC

Defrost Control - replacement for Goodman B1226008 controls.

Features

  • Replacement for Goodman B1226008
  • Time and temperature defrost
  • Time and temperature terminate
  • Test pins reduce test time by 256X
  • HOLD input tracks compressor run times
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Brand: ICM Controls   |   Manufacturer: ICM Controls

Package Dimensions: 1.75 x 6.1 x 8 inches (4.4 x 15.5 x 20.3 cm)

Amazon Price: $31.70 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $27.52 | Used Price: $9.53

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  #8

ICM Controls ICM492 Single Phase Monitor, 80-300 VAC, 5-Fault Memory, Lcd Setup And Diagnostics.

Model: ICM492   |    Mpn: ICM492   |    Ean: 0800442012766   |    PartNumber: ICM492   |   Asin: B003MX23SE

Digital single-phase line voltage monitor; fully programmable with 5-fault memory; protects against under/Over voltage, rapid short cycling; 80-300 VAC (24-240 control VAC).

Features

  • Protects Against Over and Under Voltage, and Rapid Short Cycling caused by Transient Faults and Power Interruptions
  • Easy-view, Backlit Digital Display
  • RMS Voltage Monitoring
  • Adjustable Voltage Set Point
  • Adjustable Over Voltage Setting
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Brand: ICM Controls   |   Manufacturer: ICM Controls

Item Dimensions: 2.1 x 6.3 x 8 inches (5.3 x 16.0 x 20.3 cm)   |   Package Dimensions: 1.9 x 5.7 x 6.9 inches (4.8 x 14.5 x 17.5 cm)

Amazon Price: $50.30 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $57.84

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  #9

BOB - Screen Time Manager - Manage Your TV Time & Video Game Time

Model: BOB1   |    Mpn: BOB1   |    Ean: 0094922592552   |    PartNumber: BOB1   |   Asin: B000GU78UY

TV Timer BOB helps parents manage and monitor the time their children spend using the TV and playing Video Games. The power cord from one of these devices plugs into the back of BOB and is locked in place. Parents decide an acceptable amount of viewing time for each child per day or per week. Specific time periods can be blocked entirely for studying, chores, family time and/or sleeping. Each child in the house (up to 6 users plus 1 parent user) has a four-digit PIN that they enter before they can turn on the attached device. A "master pin" allows a parent to turn on the connected device at any time. When a child's preset viewing time expires, BOB shuts off the attached TV, video-game system or computer monitor and won't allow it to be turned on by that user for the remainder of the day (or week). Unused time will carry over to the next day or week. After setup a process that takes about three minutes the machine monitors the amount of time a child spends using that device. While in use, BOB shows the user logged in and their remaining time available. Features:
o Manage the time your children spend watching TV and playing video games.
o Personal PIN access for every family member (up to 6 child accounts and 1 master, parent account).
o Weekly or daily time management. Time reporting for every user.
o Time-period blocking to prevent device use at certain times of the day. (Up to five blocks per user for any or all days of the week. Maximum of 35 blocks per user per week.)
o Quickly add bonus time or remove time from any user without changing their regular allowance.
o TV Timer BOB works with all TVs (including large screens), game consoles, and computer monitors.
o Big, easy to use keypad for the entire family, even in the dark! While in use, BOB shows the user logged in and their time remaining.
o Tamper proof and durable.
o Settings are safe during a power outage.
o 1-year manufacturer's warranty.

Features

  • Manage the time your children spend watching TV and playing video games. End the constant "TURN OFF THAT TV!" battle.
  • Personal PIN access for every family member (up to 6 child accounts and 1 parent master account).
  • Weekly or daily time management. Time reporting for every user.
  • Time-period blocking to prevent device use at certain times of the day. (Up to five blocks per user for any or all days of the week. Maximum of 35 blocks per user per week.)
  • Quickly add bonus time or remove time from any user without changing their regular allotment.
  • Manufacturer: Nextphase
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Brand: VOLTBOLT   |   Manufacturer: VOLTBOLT

Item Dimensions: 5.8 x 8.7 x 4.9 inches (14.7 x 22.1 x 12.4 cm)   |   Package Dimensions: 4.7 x 5.2 x 9 inches (11.9 x 13.2 x 22.9 cm)

Amazon Price: $65.49 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $89.99 | Used Price: $50.00

Warranty: 1 Year

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  #10

White-Rodgers 50M56U-843 White Rodgers Universal Integrated Control

Model: 50M56U-843   |    Mpn: 50M56U-843   |    Ean: 0786710539541   |    PartNumber: 50M56U-843   |   Asin: B0039ZBSWW

Replaces Virtually All White-Rodgers And Competitive Single Stage Carbide And Nitride Hsi Systems, Including Honeywell S9200U1000. Made in United States. Manufactured by White Rodgers.

Features

  • Ignition control module
  • 9 - quick-select/quick-connect wiring harnesses
  • Universal Nitride Igniter Kit - 21D64-2
  • Installation instructions and oem cross-reference
  • 3 Fan Speeds - cool, low heat & high heat speeds
  • See more on Amazon...

Brand: White-Rodgers   |   Manufacturer: White Rodgers

Item Dimensions: 2.3 x 9.7 x 11 inches (5.8 x 24.6 x 27.9 cm)   |   Package Dimensions: 4.02 x 7.4 x 12.09 inches (10.2 x 18.8 x 30.7 cm)

First Available: 2017-06-14

Amazon Price: $103.98 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 2-3 business days
List Price: $103.98

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  #11

ICM Controls ICM291 Furnace Control Replacement for Carrier LH33WP003/3A Control Boards

Model: ICM291   |    Mpn: ICM291   |    Ean: 0800442011844   |    PartNumber: ICM291   |   Asin: B0046V6VF2

Furnace Control - replacement for Carrier LH33WP003/3A control boards.

Features

  • Low cost form, fit and functional replacement for Carrier: LH33WP003A
  • Direct Spark Ignition (DSI) control board
  • Microprocessor-based
  • Controls combustion, blower and indoor fan motors; spark ignitor; and the gas valve
  • Monitors timing, trial for ignition, flame sensing and lockout
  • See more on Amazon...

Brand: ICM Controls   |   Manufacturer: ICM Controls

Item Dimensions: 7.5 x 2.9 x 8.1 inches (19.1 x 7.4 x 20.6 cm)   |   Package Dimensions: 2.8 x 7.4 x 8.1 inches (7.1 x 18.8 x 20.6 cm)

Amazon Price: $129.99 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 2-3 business days
List Price: $135.95

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  #12

TV Allowance - TV & Video Game Time Manager

Model: TVA-203   |    Mpn: TVA-203   |    Ean: 0004944700200   |    PartNumber: TVA-203   |   Asin: B000UPPBH2

The TV Allowance is a simple device which allows families to limit video game and TV viewing time. Each child chooses a 4-digit PIN to turn on the TV. That's it! How It Works:
The TV Allowance is a device that connects between a television and its supply of electricity. The TV Allowance controls the amount of time the television is allowed to be turned on.
o Set blackout times to prevent usage during certain time.
o Set a weekly TV Allowance for up to 6 children.
o Each child is given a personalized 4-digit code that is entered to access the TV.
o The parental administration code is used in setup and to use the TV without deducting anyone's allowance.
o The TV Allowance may also be used to control computer time by plugging in the computer monitor.

As children use up time watching TV, their account is debited. When the TV is shut off, the unit stops deducting time from that child's account. When all of the time is used up, the TV shuts off and will not turn back on until the beginning of the next week when the allowance is automatically restored. You can optionally set any remaining time to be added to the next week. This way a child can save up time for special occasions.

Blackout times can be set to block TV usage during homework or past bedtime hours. A parental override code is available to allow the use of the TV without debiting anyone's account. Unused time may be rolled over to the next week or eliminated.

Please Note: The TV Allowance requires that the TV or Video Game Console draws at least 50 watts of power. Smaller TVs don't draw enough power for the TV Allowance to recognize that they are turned on. The TV Allowance then turns off thinking that the child has turned off the TV and forgot to logout of the TV Allowance. The workaround is to attach another electrical device like a small lamp to it as well. This will draw enough power for the TVAllowance to work properly.

Features

  • Fewer arguments - You will no longer have to keep asking your child to turn off the TV each day.
  • Empowerment - Your children will be able to manage their own TV time, learning budgeting, decision making and prioritizing.
  • Free Time - Your children will spend more time playing sports, reading, etc. This will lead to healthier children!
  • Automatic - This is the only TV time management solution that will automatically renew the weekly allowance.
  • The TV Allowance will help your children manage their own time on the TV or playing video games.
  • See more on Amazon...

Brand: TV Allowance   |   Manufacturer: TV Allowance

Item Dimensions: 4 x 6 x 7 inches (10.2 x 15.2 x 17.8 cm)   |   Package Dimensions: 3.7 x 6.3 x 7.4 inches (9.4 x 16.0 x 18.8 cm)

Amazon Price: $29.99 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $29.99

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  #13

HiLetgo 5pcs DS3231 High Precision RTC Real Time Clock Module 3.3V/5V Arduino Raspberry Pi

 PartNumber: 3-01-1198   |   Asin: B01N1LZSK3

Description:
The module itself can adapt to 3.3V and 5V system, no need for level conversion, which is super convenient;
Provide continuous timing battery backup;
Complete clock calendar function includes second, minute, time, week, date, month, and year, and provide leap year?compensation until 2100;?
Low power consumption;
Two calendar clock;
Reset output and anti-shake input;
Specification
During -40 C to + 85 C temperature range, timing accuracy is 5 PPM ( 0.432sec/day);
1 Hz and 32.768 kHz output;
High speed (400 KHZ)I2C serial bus;
+2.3 V to + 5.5V power supply voltage;
Precision of digital temperature sensor is 3 C;
Connection diagram:
Pls refer to the last photo in above photo window.
Package included:
5* DS3231 High Precision Real Time Clock RTC Module?

Features

  • High Precision DS3231 RTC Real Time Clock Module
  • Two calendar clock
  • Reset output and anti-shake inpu
  • High speed (400 KHZ)I2C serial bus
  • Precision of digital temperature sensor is 3 C
  • See more on Amazon...

Brand: HiLetgo   |   Manufacturer: HiLetgo®

Package Dimensions: 0.39 x 3.15 x 3.94 inches (1.0 x 8.0 x 10.0 cm)

Amazon Price: $10.99 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $10.99

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  #14

Major Brands CD4046 Semiconductor, Power Phase Lock Loop, Dip-16 (Pack of 10)

Model: CD4046   |    Mpn: CD4046B-MIL   |    Ean: 7895096721242   |    PartNumber: CD4046B-MIL   |   Asin: B00CHTJTW2

The product type is Major Brands CD4046 Semiconductor, Power Phase Lock Loop, Dip-16. Made in Taiwan and manufactured by Major Brands.

Features

  • Logic circuit type - phase locked loop
  • Input frequency-max (MHz) - 14
  • Supply voltage-nom (vsup) (v) - 10
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Brand: Texas Instruments   |   Manufacturer: Texas Instruments

Package Dimensions: 0.9 x 1.7 x 4.1 inches (2.3 x 4.3 x 10.4 cm)

Amazon Price: $5.00 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $8.58

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  #15

Texas Instruments NE555N NE555 NE555P General Purpose Single Bipolar Timer DIP8 50 Pack

Model: 1069802   |    Mpn: 1069802   |    Ean: 0622430306325   |    PartNumber: 1069802   |   Asin: B01BVATI82

These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor.

The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.

The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.

Features

Brand: elegantstunning   |   Manufacturer: elegantstunning

Package Dimensions: 0.2 x 1.89 x 4.29 inches (0.5 x 4.8 x 10.9 cm)

Amazon Price: $3.99 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $3.46

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  #16

ele ELEOPTION 6 Packs Replacement Battery PLC for Allen Bradley 1756-BA2 BR2/3A-AB 3.0V 1200mAh

Model: CNC3399GR   |    Mpn: CNC3399GR   |    PartNumber: CNC3399GR   |   Asin: B07727YCPK

AB PLC applies to the following series: 1746-BAS, 1747-PT1 Series; 1756-L1, 1756-L1M1, 1756-L1M2, 1756-L1M3 Series; 1771 Series; 1771-DB Series; 1772 Series; 1775 Series; 1785-L40B / L, 1785-L60B / L Series; 6008-LTV Series; A-2/05, A-2/16, A-2/17 Series; B, B-2/16, B-2/17 Series; C-2/16, C-2/17 Series; D-2/16, D-2/17 Series; DL20 DataLiner Series; HHT Series; Logix 5550, Logix 5555, Logix 5563 Series; MINI-PLC-2 Series; MINI-PLC-2/16, MlNl-PLC-2/17 Series; PLC-2, PLC-3 Series; PLC-3 Series; PLC-4 Series; PLC-5 Series; PLC-5/11, PLC-5/20, PLC-5/30, PLC-5/40, PLC-5/60 Series; PLC-5VME Series; SLC-100, SLC-150 Series; SLC-5/01, SLC-5/02, SLC-5/03, SLC-5/04, SLC-5/05 Series; SLC-500 Series; Package Included: 6 x PLC Battery

Features

  • Allen Bradley 1756-BA2 BR2/3A-AB 3.0V Battery
  • Smart cable, ensure safe to use, Portability with small size
  • Easily and conveniently used in every driver. Safe products, good at shedding heat
  • Model: 1745-B1, 1747-BA, 1756-BA1, 1756-BA2, 1763-BA, 1770-XO, 1770-HMA, 1770-XR, 1770-XY, 1770-XYB, 1770-XYC, 1770-XYV, 1770- XZ, 1771-HMA, 2706-NB1
  • Model number: BR2/3A-AB/3.0V TYPE: 1756-BA2 Cell type: Lithium Voltage: 3.0v Capacity:1200mah
  • See more on Amazon...

Brand: ele ELEOPTION   |   Manufacturer: ELEOPTION

Amazon Price: $49.99 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 1-2 business days
List Price: $49.99

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  #17

Sci-Supply SS77658-6 Sci-Supply Bulk Stopwatches (Pack of 6)

Model: SS77658-6   |    Mpn: SS77658-6   |    Ean: 0851214008203   |    PartNumber: SS77658-6   |   Asin: B077BZ61J5

Sci-Supply bulk stopwatches, package of 6. These convenient and economical stopwatches are durable and dependable. Lanyard and button cell battery are included!

Brand new model for 2018 (August 2017 Release). These are fantastic economy stopwatches!

Features

  • Sci-Supply Bulk Stopwatches, Package of 6
  • 1/100 Second Readout
  • Split/Lap Time
  • Highly Visible Yellow and Black
  • Battery Included (AG8 Button Cell)
  • Lanyard Included
  • See more on Amazon...

Brand: Sci-Supply   |   Manufacturer: Sci-Supply

Package Dimensions: 2.68 x 4.37 x 7.8 inches (6.8 x 11.1 x 19.8 cm)

First Available: 2017-11-11

Amazon Price: $27.23 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $27.49

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  #18

NE555N NE555 NE555P General Purpose Single Bipolar Timer DIP8 5 Pack

Model: NE555P   |    Mpn: NE555P   |    Ean: 0313556842629   |    PartNumber: NE555P   |   Asin: B01A13F2V2

These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor. The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground. The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.

Features

  • Timing From Microseconds to Hours
  • Astable or Monostable Operation
  • Adjustable Duty Cycle
  • TTL-Compatible Output Can Sink or Source up to 200 mA
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Brand: Texas Instruments   |   Manufacturer: Texas Instruments

Package Dimensions: 0.1 x 0.9 x 3.7 inches (0.3 x 2.3 x 9.4 cm)

Amazon Price: $4.85 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $4.85

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  #19

Potato Clock with No Mess Holder, Fruit Clock

Model: LC20719   |    Mpn: LC20719   |    Ean: 0851214008227   |    PartNumber: LC20719   |   Asin: B077BYX13M

This Potato Clock is designed to demonstrate the principle of an electrochemical cell. The LCD clock runs on 2 potatoes, oranges, lemons, grapefruits or cans of soda. The no-mess design with attached electrodes is great for young experimenters, and assures that the parts will not go missing after time. The compact design allows for convenient storage when not in use. SpecificationsDimensions: 9" x 4" x 3" Weight: 9oz.

Features

  • This potato clock is designed to demonstrate the principle of an electrochemical cell
  • The lcd clock runs on 2 potatoes, oranges, lemons, grapefruits or cans of soda
  • This product is manufactured in china
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Brand: Sci-Supply   |   Manufacturer: Sci-Supply

Package Dimensions: 3 x 4 x 9 inches (7.6 x 10.2 x 22.9 cm)

First Available: 2017-11-11

Amazon Price: $11.31 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $11.32

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  #20

HiLetgo 5pcs DS3231 AT24C32 Clock Module Real Time Clock Module IIC RTC Module for Arduino Without Battery

Model: 3-01-0435   |    Mpn: 3-01-0435   |    Ean: 0702082656587   |    PartNumber: 3-01-0435   |   Asin: B00LX3V7F0

DS3231 AT24C32 Clock Module Real Time Clock Module IIC RTC Module for Arduino
Parameters:
1. Dimension: 38mm* 22mm * 14mm
2. Weight:. 8g
3. Working voltage : 3.3 -. 5 .5 V
4. Clock chip: high-precision clock chip DS3231
5. Clock accuracy within range :0-40 , accuracy 2ppm, about 1 minute in error
6. Programmable square-wave output
7. Real-time clock, it can generate seconds, minutes, hours, day, date, month and year, and provide time until 2100, and with leap year compensation.
8. Internal chip temperature sensor comes with an accuracy of 3
9. Memory chips:. AT24C32 (storage capacity of 32K)
10. IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
11. IIC other devices can be cascaded, 24C32 address can be modified by a short circuit A0/A1/A2, the default address is 0x57

Features

  • HiLetgo DS3231 AT24C32 Clock Module Real Time Clock Module
  • Working voltage : 3.3 -. 5 .5 V
  • Clock chip: high-precision clock chip DS3231
  • Memory chips:. AT24C32
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Brand: HiLetgo   |   Manufacturer: HiLetgo

Package Dimensions: 1.97 x 3.15 x 3.94 inches (5.0 x 8.0 x 10.0 cm)

Amazon Price: $10.99 | as of 11/21/2018(4:47am pst)
Availibility: Usually ships in 24 hours
List Price: $3.46

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