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Posts Tagged ‘tester’

Network cable tester

Friday, September 15th, 2017

Dilshan Jayakody writes, "This is an automatic Cat6 / Cat5 network cable tester designed using NE555 timer and 4017 decade counters. This unit test all 8 wire lines of twisted pair network cable and indicate pass/fail status with single LED. We design this unit to test network connectivity issues in...

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Posted in DIY | 4 Comments »

Pogo pin test board for ADB-USB Wombat

Tuesday, July 18th, 2017

A pogo pin tester for the ADB-USB Wombat board from Big Mess o’ Wires: Here’s a test rig for the ADB-USB Wombat board: my first-ever project whose sole purpose is to facilitate testing of another project. It uses spring-loaded pogo pins to create a bed of nails that fit into test...

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Posted in testing | No Comments »

Simple crystal tester

Monday, May 2nd, 2016

Dilshan Jayakody writes: This is simple Colpitts oscillator to test commonly available passive crystals which range between 2MHz to 27MHz. This unit must connect to an oscilloscope and/or frequency counter to get the frequency of the crystal. This circuit is design to work around 9V to 12V DC power source....

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Posted in RF, testing | No Comments »

USB power supply active load tester

Thursday, September 10th, 2015

Sasa Karanovic has designed and built a DIY USB power Supply active load tester, that is available at GitHub: USB Power supply Active Load Tester or short PAL Tester is unit designed for testing the quality of the power supplies. Idea was to create low-cost, precise device for simultaneous measurement...

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Posted in DIY | 11 Comments »

Simple SMD LED tester

Thursday, February 20th, 2014

Peter over at Electronics-Lab posted an article describing how he designed and built his simple SMD LED tester: This project is a simple LED tester and LED polarity checker. It can be used to check 1206, 0805, 0603 and 5mm LEDs. All parts are readily available and they are very cheap. Usage is...

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Posted in LEDs | 6 Comments »

Inductor saturation tester

Sunday, November 3rd, 2013

In relation to the previously posted Power inductor checker,  Lindsay refers us to Alan Yates' article on inductor saturation tester: As a result of recent work on switchmode power converters I needed the ability to measure the saturation properties of inductors. This simple instrument was built to allow visualisation of the current ramp...

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Posted in app notes | No Comments »

Transistor tester project

Tuesday, September 17th, 2013

Hemal Chevli blogged about his transistor tester project: It has mega-8 as the brain, lcd to show specs of the transistor like which pin is which, what type of transistor it is eg NPN,PNP, N-MOSFET,P-MOSFET, etc., many components can be tested like different types of transistor, diodes, resistors etc, the good...

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Posted in tools | 1 Comment »

PCB a Week 20: LEDger Led (polarity) tester

Monday, August 5th, 2013

Mats continues his challenge of designing one PCB every week. In week 20 he came up with LEDger Led (polarity) tester: Everytime I solder a SMD LED on a pcb I have to turn on one of my multimeters and flip it over to diode-test mode and then probe the...

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Posted in PCBs, project logs | 4 Comments »

USB current and voltage tester designed on the DP5031 standard PCB

Monday, October 8th, 2012

Here is TitanMKD's USB current, and voltage tester designed on the DP5031 standard PCB. The board features 4 standard USB connectors, while voltage and current can be measured via 4mm banana terminals For those interested in a cheap funny board to test USB current consumption/voltage or even check USB D+/D-...

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Posted in project logs, USB | No Comments »

Test Nixie tubes with a flip of a switch

Thursday, December 29th, 2011

[embed]http://www.youtube.com/watch?v=pSZMMpjQ5KU[/embed] This Nixie tube tester has an 11 position switch to change the displayed digits. A simple device for testing and/or healing Nixie tubes of IN-18 type. An 11-pole switch is connected in series with a 50 KΩ pot (+ 470 Ω resistor for safety), powering from an 180V DC...

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Posted in DIY | No Comments »

Prototype: Flash_Destroyer

Tuesday, May 25th, 2010

The most recent documentation is now on the wiki EEPROMs, such as flash memory, store data in electronic devices like cell phones, smart cards, SD cards, and solid-state drives. This type of memory can only endure a limited number of writes, it will eventually wear out and it won't store...

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Posted in Flash Destroyer, Prototypes | 29 Comments »

Recent Comments

  • Drone: So these go for around $330 USD and NO published calibration procedure online or otherwise? Given what's inside - I don't think I'll be considering...
  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...