Hi,
I've to power APM with 6S batteries. I intend to use the PDB as power source. I must therefore step the voltage down to APM's required level, that is between 4.8V and 5.25V. This range must be kept under load to avoid a brown out.
This is where the question is coming:
-knowing that JP1 is off and thus I will use the input rail to power APM
-knowing that APM will power the following: GPS, receiver, telemetry(3DR), a buzzer, two LEDs,
-> what is the minimum amps I should feed to APM?
I would like to use a polulu buck that outputs max 600 milliamps. Is that enough current?
Second question: is there any interest to add a small capacitor on polulu module's output ( between Vout and GND) to smooth the output of small parasitic spikes?
Third question: this polulu module is a switching regulator. Frequency is 150 KHz. Is it OK to power APM with it?
Replies
I know this is not exactly what you're asking about but if you want to enable battery and current monitoring the AttoPilot 180Amp sensor will work for you. Wiki page is here.
The whole system will draw max about 300-350mA with what you propose. I assume you mean this one? http://www.pololu.com/catalog/product/2107 If you use the RFD900 radio though, it's going to be not enough current supply.(you're not, i know, but for information for others)
It should work, no problem.