This is a 3Digits Digital Ammeter using PIC16F684 Microcontroller and ACS712 current sensor. The measured DC or AC current will display on 3 digits 7-segment with resolution 100 mA. The current sensor in this project is ACS712ELCTR-30A-T from Allegro(I got from ebay). It can measure the AC or DC current up to 30A with 66 mV/A output sensitivity. The microcontroller PIC16F684 reading analog value from the ACS712 current sensor output and convert to curent for diplaying on 7-segment. All 7-segments are commond anode type and driven by pnp transistor . Actually, this circuit suitable for measuring DC current e.g. solar panel to battery, battery to load.
PIC16F684 Microcontroller and ACS712 based 3 Digits Digital Ammeter
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