So I've come pretty far in my summer project to clone a certain old analogue drum machine and now it's time for the power supply.
The original unit is powered by a good ol transformer, 2x 2200uf caps, 2x 10uf caps, a full bridge rectifier and a 7808 and 7908 voltage regulators, needless to say it's pretty noisy.
For various reasons I have decided not to supply the kit it with a linear psu and a transformer involving mains wiring.
So I'm looking for a reasonably small and quite +/- 8v supply/regulator design, requirements:
*Must fit on a board that is max 145x45mm (50mm height)
*+/- 8v output
*Around 200-300ma output
*No mains wiring, preferably powered with a ac/dc power adapter (ac/ac works too)
*Switching design is fine by me as long as it's reasonably quite
*Preferably all through hole components
The original unit is powered by a good ol transformer, 2x 2200uf caps, 2x 10uf caps, a full bridge rectifier and a 7808 and 7908 voltage regulators, needless to say it's pretty noisy.
For various reasons I have decided not to supply the kit it with a linear psu and a transformer involving mains wiring.
So I'm looking for a reasonably small and quite +/- 8v supply/regulator design, requirements:
*Must fit on a board that is max 145x45mm (50mm height)
*+/- 8v output
*Around 200-300ma output
*No mains wiring, preferably powered with a ac/dc power adapter (ac/ac works too)
*Switching design is fine by me as long as it's reasonably quite
*Preferably all through hole components
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What about good, old LM317 / LM337? With proper implementation IMHO they are still more than enough for most circuits.
Here's power supply part of my headphone amplfier. External 16V 1.1A AC/AC wall wart is used with half wave rectifier. Input is CLC filtered but inductor can be replaced with resistor or even ommited. Zener diodes are used instead of resistors to set reference voltage to push noise even lower. +/- 8V output can be set with simply choosing diffrent zeners. There are two LEDs at both rails. Besides being indicators they run at relatively high current, providing constant load to regulators and keeping low output impedance. If you don't want to make your own layout I can share gerbers. Resistors and diodes are SMD tho, but 1206 is pretty easy to solder by hand.
The SilentSwitcher is another interesting option. Amazing performance in small size and very easy to use. The SilentSwitcher | Linear Audio NL
Here's power supply part of my headphone amplfier. External 16V 1.1A AC/AC wall wart is used with half wave rectifier. Input is CLC filtered but inductor can be replaced with resistor or even ommited. Zener diodes are used instead of resistors to set reference voltage to push noise even lower. +/- 8V output can be set with simply choosing diffrent zeners. There are two LEDs at both rails. Besides being indicators they run at relatively high current, providing constant load to regulators and keeping low output impedance. If you don't want to make your own layout I can share gerbers. Resistors and diodes are SMD tho, but 1206 is pretty easy to solder by hand.
The SilentSwitcher is another interesting option. Amazing performance in small size and very easy to use. The SilentSwitcher | Linear Audio NL
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Wow, this looks literally perfect! If you'd care to share the gerbers that would be very appreciated!
Yea I've looked at the SilentSwitcher and it indeed looks awesome, all though a bit too pricey for what I'm aiming for.
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