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servos run on 6.5V, but how many amps? Answered

I have five servos running off a picaxe sd21 servo controller and it will operate using four AA batteries, but I want it to run off a wall adaptor. Now theres plenty of adjustable adaptors on the market giving from 3V to 12V and I've seen one that might work for me that can be set to 6.5/ 7.5V, but does anyone know the suitable current range for my device.

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jonnymelon

5 years ago

I'm trying to read the current going through my sd21 with seven servos. The leads are plugged into com and 10adc ports on the multimeter. With the dial switched to 200m DCA it reads 22.0 or dial at 20m = 2.20. So what is the current, 2 amps or 200 milliamps. The adjustable adapter I have gives 3V to 12V but only up to 300milliamps so I need to know whether this adapter will be of any use to me.

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verence

5 years ago

That's what a multimeter is for. Put it in current mode, put it into the supply line, get as many servos to work as there may run simultaneously. Read the current consumption and multiply by 2 (or another safety factor of your choice).

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jonnymelonverence

Reply 5 years ago

Thanks verence. I did think of that, but didn't think it would be that easy. I'll try your suggestion and let you know.