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DIY power supply

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MarkF:


--- Quote from: Pirateguy on September 24, 2018, 07:33:04 am ---this suggests a +5v and +12v rails can somehow be used to create 7v??

--- End quote ---
   +12V - +5V = +7V

You would be using the 5V rail as the reference (ground).  The ground output in this case would be -5V.  This also prevents you from using the remaining outputs in their normal way.  NOT something I would recommend on a routine bases.  I would stay away from the odd voltage combinations and just use it as designed.  i don't know why it was even brought up.  It just confuses the novice!

ONCE AGAIN.  DON'T GET CREATIVE.   |O

Just use the -12V, +12V, +5V and +3.3V outputs as designed.  In practice, you will seldom use or want anything else.

I would use the smaller 150 watt power supply.  There is NO way you would need the current capabilities of the larger one.

If the smallest 10W supply has a +24V output, I would use it for the adjustable supply instead of the +32V supply.  That is if you're still building the LM317/LM338 design we discussed earlier.  It would ease the power dissipation concerns.

Pirateguy:
actually no i ordered one of those dps3012 modules.

and no worries, i already got creative :P


so i have a selector switch between .9A 6A and no poly fuse, and a bit with a
switch and momentary button and a 3.5mm jack on the ground in case i need
to cut power quick, or just want to give a quick jolt to see if something works or not.
the 3.5mm jack connects to another button or a foot pedal to do the same remotely.
also they are all connected to RGB LEDs to indicate power and which fuse setting they are on.

is there ever a reason to limit 3.3v or should i just skip the switch on that one and put a 6A fuse?

ricktendo:
Don't forget to check out OpenDPS, you can remote control it over WiFi and upgrade over Serial!!!

https://github.com/kanflo/opendps

I wish I had the money to send one of each RD-DPS units to the developer, maybe somebody can contact him and/or setup a gofundme to collect money for the hardware for development!!!

Pirateguy:
thanks

but i don't think the model i have has the wifi capability.

ricktendo:

--- Quote from: Pirateguy on September 24, 2018, 05:29:06 pm ---thanks

but i don't think the model i have has the wifi capability.

--- End quote ---
They are all WiFi capable, its a matter of adding a ESP8266 board.

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