Easy Circuit Tester

Easy Circuit Tester

In everyday work, I noticed that most of the time when using a multimeter it takes me to check the contacts, so this project has matured for a very long time, and only today it was done :)
Using the tester, you can check not only the contacts, but also the batteries, diodes, transistors, resistors, capacitors and much more (resistors and capacitors up to a certain rating), and you can also check the presence of mains voltage.
Circuit and gerber-files in the project archive.
*I ordered a printed circuit board only now (2020/03/07) https://jlcpcb.com/ , so I’ll shoot the assembly video after I receive my order.
PCB Dimensions 74.52 x 21.2mm
Parts links below:


Transistors Q1,Q2 BC847B SOT-23 - http://ali.pub/4jnd4f
LED red 0805 - http://ali.pub/4jnd9v
LED green 0805 - http://ali.pub/4jndga
Diode 1N4007 SOD-123FL - http://ali.pub/4jndk6
Resistor R1 39k 0805 - http://ali.pub/4jnf9m
Resistor R2 120k 0805 - http://ali.pub/4jnf9m
Resistor R3 115 0805 - h