Go Down

Topic: three servos, 4 motors, LED's....How do I power all this stuff? (Read 983 times) previous topic - next topic

ifugaopapercraft

I am working on a sculpture that includes three servos, 4 x  12v motors, and 30 LED's. The three servos are running well on a 6v/1.5 amp wall wart. The additional three motors (12v, 500 mA each) will be ready for testing in a few day. Ideally, I would like to use a single power supply for the entire project. Something ready made wold be great but I see no Wall Wart rated more than 2 Amp.  Is there something salvageable? If not, do I have to order a transformer, rectify it from scratch?   If the total is 5 amps, do I make a rail and regulate with 78-- or LM317? 

Krodal

A 78-- or LM317 are for 1A or a little more and they get hot, you might need a heatsink.
A DC-DC converter is very efficient.

Do you use an Arduino and a motor driver ?
If the servos are 6V, you could use a DC-DC converter to 6V and use it for the adapter plug (or Vin) of the Arduino and the servos.

If you can power the leds with 12V or a with second DC-DC converter, you would only need a power supply of 12V.

ifugaopapercraft

Are the DC to DC converters you describe the same as "buck converters?  I am looking at tutorials to understand your suggestion. Are these circuits or a single component?

CrossRoads

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

Krodal

#4
Feb 11, 2013, 09:28 am Last Edit: Feb 11, 2013, 09:29 am by Krodal Reason: 1

Are the DC to DC converters you describe the same as "buck converters?  I am looking at tutorials to understand your suggestion. Are these circuits or a single component?


DC-DC converters is a common name for step-up, step-down, boost and buck-boost converters.
Sometimes it is a small black box (with the components inside), but mostly it is a circuit board.
Some examples: http://www.ebay.com/sch/i.html?_nkw=dc+dc+converter

Go Up