Hello,
my question is really simple and straightforward (maybe a little bit stupid) but I couldn't find any simple answer anywhere. What is common solution to powering both preamp and power amp? (I'm talking about really low power ones). To be more specific, if I want to build a PAM8403 based little amplifier and I also want to play with that sound i little bit before, so I need some preamp. What is the best way to power it all when PAM8403 needs +5V and preamp needs something like ±12V? (Maybe ±5V would be enough in this case). I mean make totally separeate devices? Make one device and separate power supplies in it? Or is there any simple solution to have common power supply for both?
Thanks everyone for advices and experiences, I really appreciate it!
my question is really simple and straightforward (maybe a little bit stupid) but I couldn't find any simple answer anywhere. What is common solution to powering both preamp and power amp? (I'm talking about really low power ones). To be more specific, if I want to build a PAM8403 based little amplifier and I also want to play with that sound i little bit before, so I need some preamp. What is the best way to power it all when PAM8403 needs +5V and preamp needs something like ±12V? (Maybe ±5V would be enough in this case). I mean make totally separeate devices? Make one device and separate power supplies in it? Or is there any simple solution to have common power supply for both?
Thanks everyone for advices and experiences, I really appreciate it!
Since this is just a 3W amp, my advice is -
1 Go for pam 8410 or even better PBTL3118, more wattage
2 Simple DIY single supply-based preamp on JRC4558 / 5532 with gain of 10
3 bass+ treble+ volume kit or fully assembled, usually works on split supply using 3 opamps
I recommend separate power supplies to avoid hums and ground loops
If you can do SMD soldering, gain resistors can be changed to get more gain
4 Software based gain booster like VLC
1 Go for pam 8410 or even better PBTL3118, more wattage
2 Simple DIY single supply-based preamp on JRC4558 / 5532 with gain of 10
3 bass+ treble+ volume kit or fully assembled, usually works on split supply using 3 opamps
I recommend separate power supplies to avoid hums and ground loops
If you can do SMD soldering, gain resistors can be changed to get more gain
4 Software based gain booster like VLC
There's one more simple solution: use a 5 V supply, prefferably an r core transformer or just simple toroid plus rectifiers and filter and a symmetrical voltage doubler to make +-10v You do it classical from the 50hz output of the transformer with rectifiers and capacitors, you're using a chip like this :
https://www.maximintegrated.com/en/products/power/charge-pumps/MAX680.html
Or you're using a resonant royer-baxandall inverter with two ztx851 a 1cm ferrite , a capacitor and coil.
https://www.maximintegrated.com/en/products/power/charge-pumps/MAX680.html
Or you're using a resonant royer-baxandall inverter with two ztx851 a 1cm ferrite , a capacitor and coil.