If you ask me which instruments I regularly use in the lab, you will hear Multimeter, Oscilloscope, Transistor or Component Tester. And since quite some time I ask myself: How is it possible to build such a versatile component tester for less than 10 dollars. After looking at the minimal parts count of such a device, I am convinced: The inventor was a Genius. Let’s have a closer look. I am a proud Patreon of GreatScott!, Electroboom, Electronoobs, and others. Links: Transistor (Component) Tester: http://s.click.aliexpress.com/e/LOI5JxrE or http://bit.ly/2m5s4qW or http://bit.ly/2nFgNOn Description: https://www.mikrocontroller.net/articles/AVR_Transistortester Manual: https://github.com/svn2github/transistortester/tree/master/Doku/tags/english #Arduino #Maker #Electronics Supporting Material and Blog Page: http://www.sensorsiot.org/ Github: https://www.github.com/sensorsiot My Patreon Page: https://www.patreon.com/AndreasSpiess My Bitcoin address: 19FSmqbBzb5zsYB1d8Bq4KbxVmezToDNTV If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel For Banggood https://bit.ly/2jAQEf4 For AliExpress: http://bit.ly/2B0yTLL For ebay.com: http://ebay.to/2DuYXBp https://www.facebook.com/profile.php?id=100013947273409 https://twitter.com/spiessa https://www.instructables.com/member/Andreas%20Spiess/ Please do not try to Email me or invite me on LinkedIn. These communication channels are reserved for my primary job