Rigor69
Newbie level 2
pic adc zener reference
Hi there.
I'm working with a Battery Management Project.
On each cell, 2,5 to 4,25 V, I will put a PIC, powered directly from the cell voltage.
This gives me a variable power supply to the circuit.
However, as I monitor the cell voltage with the same PIC built in ADC, I cannot figure out how to create my reference. Clearly it must be lower then the minimum voltage, say 1.8V.
But How can I know the supply voltage to the PIC using an ADC...???
I could DC-DC to 5V, but this is very expensive.
Anyone got any suggestions?
Best Regards, Jens
Hi there.
I'm working with a Battery Management Project.
On each cell, 2,5 to 4,25 V, I will put a PIC, powered directly from the cell voltage.
This gives me a variable power supply to the circuit.
However, as I monitor the cell voltage with the same PIC built in ADC, I cannot figure out how to create my reference. Clearly it must be lower then the minimum voltage, say 1.8V.
But How can I know the supply voltage to the PIC using an ADC...???
I could DC-DC to 5V, but this is very expensive.
Anyone got any suggestions?
Best Regards, Jens