Battery Level Indicator Circuit using LM3914
This is a simple battery charge level indicator circuit and is very useful to calibrate inverter status, to measure car battery level, etc.
12v Battery Charger Circuit using LM317 (12v Power Supply)
Build a small homemade 12v lead acid battery charger circuit on PCB by using LM317 with Arduino, which will provide the variable voltage and variable current.
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Vintage Model 200C IBM Voltage Ohm Meter Test Equipment. It.is a real throw back IBM technicians piece. It works and is in great shape as you can see from the pictures. There is a small chip on the bottom and the black cord has about a half inch of electrical tape on it. This is great for your