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| Discrete Regulated power supply |
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| HoracioDos:
While looking for PSU circuits with passive components I found this one. from https://www.homemade-circuits.com/how-to-make-versatile-variable-voltage/ It's a simplified version of a previous one. I liked this site very much. PS: I guess it can be mirrored like this one to get positive and negative voltage. https://www.homemade-circuits.com/0-to-50v-0-to10amp-variable-dual-power/ Is there any policy about linking content between sites? |
| HoracioDos:
Here is Ltspice model for Nuno PSU. Voltage output raises very slow and there's no ripple. It will take me a while to understand how the BJT network works in both circuits and how to choose different kind of loads in ltspice. I found Kicad schematics and PCB for this one. PS: if someone arrives to an improved and working version, please post it here. |
| not1xor1:
--- Quote from: HoracioDos on June 26, 2018, 12:35:24 am ---While looking for PSU circuits with passive components I found this one. from https://www.homemade-circuits.com/how-to-make-versatile-variable-voltage/ It's a simplified version of a previous one. I liked this site very much. PS: I guess it can be mirrored like this one to get positive and negative voltage. https://www.homemade-circuits.com/0-to-50v-0-to10amp-variable-dual-power/ Is there any policy about linking content between sites? --- End quote --- ROTFL "Ripple free, with less than 1Vpp" :o and 0-100V with a 2N3055? |O and just Vbe as V reference... :palm: that would have been a really bad project even 50-60 years ago now there are no excuse for such rubbish :-- just forget it |
| HoracioDos:
--- Quote from: not1xor1 on June 26, 2018, 04:02:41 pm ---ROTFL "Ripple free, with less than 1Vpp" :o and 0-100V with a 2N3055? |O and just Vbe as V reference... :palm: that would have been a really bad project even 50-60 years ago now there are no excuse for such rubbish :-- just forget it --- End quote --- I see. I still don't have the skills to spot these things. Internet fooled me again, but it makes me wonder what I did wrong because I didn't see the ripple. I will check it again. |
| blackdog:
Hi, All i see is schematics who do not care about phase marging... Like the schematic with 1000uF at the output, this must be a joke... |O Power supply's are not simpel! Can you build a good powersupply with discrete components, yes!, but you need to follow the same rules as with a opamp power supply. Anyone who wants to build power supply will have to learn what phase margin and gain margin is. And do dynamic testing. :-) Kind regard, Blackdog |
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