I'm planning to build a EEVblog-ish constant dummy loadĀ for battery and power supply testing. Dave in his build used a LCD voltmeter for the display. In the senseless pursuit of difference, I tried other display solutions including character LCD, graphics LCD, OLED, TFT, AMOLED, IPS, which resulted in several previous blogs but nothing ends up … Continue reading Hacking a cheap LED voltmeter