Electronics > Beginners
DIY power supply
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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