| Electronics > Beginners |
| DIY power supply |
| << < (20/31) > >> |
| MarkF:
can i put n led on a negative volt rail? Yes. But you need to reverse the polarity of the LED. what about the polyswitch? Do you mean polyfuses? These: https://www.mouser.com/ProductDetail/Littelfuse/60R065XPR?qs=sGAEpiMZZMsxR%252bBXi4wRUCTGuoKQj3D%2fWlrADHdQXLA%3d This diagram might help (Again you may not need the load resistor for the supply to turn on): |
| havewattwilltravel:
One thought: You can get really cheap low voltage digital voltmeter+ammeter boards on Ebay, which allows you to watch several channels simultaneously and still have a meter free. |
| Pirateguy:
--- Quote from: MarkF on August 24, 2018, 01:09:00 am ---can i put n led on a negative volt rail? Yes. But you need to reverse the polarity of the LED. what about the polyswitch? Do you mean polyfuses? These: https://www.mouser.com/ProductDetail/Littelfuse/60R065XPR?qs=sGAEpiMZZMsxR%252bBXi4wRUCTGuoKQj3D%2fWlrADHdQXLA%3d This diagram might help (Again you may not need the load resistor for the supply to turn on): --- End quote --- ahh thanks :) --- Quote from: havewattwilltravel on August 24, 2018, 01:55:34 am ---One thought: You can get really cheap low voltage digital voltmeter+ammeter boards on Ebay, which allows you to watch several channels simultaneously and still have a meter free. --- End quote --- yeah mean the panel mount ones? yeah i got 2 of those, but for the fixed outputs i don't really need one i think. anyways i'd have to either have 3 of them or have a switch for it, and i have no room for that. i did put in a temp display though, and the variable psu ill make after this will have a meter in it. |
| MarkF:
I missed the 3.3V Sense wire (Brown). It needs to be tied to one of the 3.3V Output wires (Orange). |
| Pirateguy:
lol no worries. my atx has neither 3.3v nor 3.3v sense wires :P i added a step down module to get the 3v. i also don't have a power on wire that i can see... so it looks like my first planned upgrade will be a double pole version of the power switch :P hopefully the chinese won't make me wait too long... in any case here she blows: |
| Navigation |
| Message Index |
| Next page |
| Previous page |