I recently got an AS2000L Linear Ultra-Micro Servo motor from Spektrum micronradiocontrol.co.uk/spektrum_servo.html and want to control it using the SSC-32. However, this motor requires voltages in the range 3.2 - 4.2 V whereas AFAIK, the SSC-32 puts out 5V. Given the voltage disparity, I am thinking plugging this motor in is not a good idea. Any ideas on how to get around this problem?
Here are some options I am have seen - opinions are welcome:
pololu.com/catalog/product/2103 - I was thinking of sending the VS output from the SSC-32 through this and then to the motor
amazon.com/Align-Two-way-Ste … B0041G45GO - this wont work for me as it transforms 6V to 5 V, whereas, I need to transform 5 V to 3.2 V. Any idea if there is an equivalent product for 5 -> 3.2/4.2?
The 5vdc regulator on the SSC-32 is for the logic, not the servos. The servo voltage is fed directly from the VS terminals to the servo power connectors. So you could just apply a single cell lipo to the VS terminals for that servo. If you are using 6vdc and 3.7vdc servos on the SSC-32 you could put the 6vdc servos on one side and the 3.7vdc servos on the other side.
The diode will work, but it’s not the preferred method. Use this simple low drop out 3.3vdc regulator. Digikey part number MC33269T-3.3GOS-ND. search.digikey.com/us/en/product … -ND/920880
It’s only $1.09 and it’s designed to provide 3.3vdc at up to 800mA which is ample for a few of those servos. If you do some searching on Digikey you may find a 3.7vdc, 4.2vdc or even adjustable ones. Look at the design data sheet. You will need a good tantalum cap on the output I believe. The idea is to put this between your 5 or 6vdc input and the servo.
