The smallest DIY auto electrician's test board with an Arduino display.
DIY auto electrician's test board using the ATTINY85.
Despite its size, the test board offers quite a bit more functionality than its Chinese counterparts from AliExpress.
First, the test board has a continuity test function. If the wire being tested is intact, MASSA appears on the screen. I couldn't find an SMD buzzer for the board's size, so I installed a capacitor on the PB0 (aka AREF) output instead to ensure measurement stability (we'll discuss this in more detail when disassembling the sketch).
Second, the test board can measure voltage in the range from 0 to 50 volts.
Third, the test board has reverse polarity protection. And despite all its advantages, the printed circuit board of our measuring device is smaller than a matchbox...
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[Links to the first two parts]
Arduino test board with oscilloscope, CAN bus search, frequency counter, voltmeter, and continuity test functions
• Контролька автоэлектрика на Arduino, с фун...
The smallest Arduino test board
• Самая маленькая контролька автоэлектрика с...
[Links for the board manager]
http://drazzy.com/package_drazzy.com_...
[Libraries and sketch]
No registration or payment required to download; just click the green "CODE" button, then "Download" ZIP"
https://github.com/chevichelov/CONTRO...
[Details]
Display 0.91 https://aliexpress.ru/item/1005005399...
SMD Capacitors 1206 https://aliexpress.ru/item/1005005634...
SMD Resistors 1206 https://aliexpress.ru/item/3277415055...
Digispark https://aliexpress.ru/item/4000256522...