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xenobie

Power supply circuit ideas

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I have a project which required 3.3v (170mA), 5v (1.2A), 12V (not sure yet). For the 3.3v I am going to use an AMS1117-3.3 which is more then enough so this is not an issue.

I have 2 questions mainly as follows:

  1. I want to use 8x of these stepper motors driven by 8x DRV8825 and I am not sure if the specifications are correct but could it be 50mA each totaling 400mA @ 12v?
  2. I have a couple of AMS1117-5 as well and since they are a max of 1A, can I chain these? if not what do you recommend?

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If you do not need SMD perhaps "The LT138A/LT338A (LM138/LM338) series of adjustable regulators provide 5A output current over an output voltage range of 1.2V to 32V."

The LM338 is about 1$ each on ebay.

 

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