ssalbach wrote:I am bouliding a Cellog clone on experemting Pad at this time..but I use an Analog Voltage Regulator for 40V and more..
texaspyro wrote:Now I need to come up with a voltage divider circuit that does not waste any power. A 10 megohm divider would work, but the micro's input leakage current is spec'd at +/- 1 uA. That could overwhelm the divider current. I might need a micro-power op amp as a buffer...
Alan B wrote:Since the ADC is a capacitive divider, using a high Z divider with a large enough output capacitor should handle the current input that the ADC requires. I have not tested this yet but it is worth a try as long as the resulting low bandwidth is acceptable.
texaspyro wrote:... I measured the input current to the ADC and it is under 2 nanoamps!
mr.electric wrote:Does anyone have a recommendation for a relay to connect to the alarm output and pull down a throttle or flip a main power contactor. I am using just one cell log but the fact that the alarm signal is tied to ground seems to be an issue with certain controllers. For example I connected the alarm output to an older brushed controller brake signal and it does not function properly. Im looking for a small mechanical or solid state relay to connect directly to the cell log without the need to create an interface board so hopefully just a relay and associated wiring.
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