Bi-Polar LM2941T/LM2991T CRCRC Regulated PSU

Another power supply I am in the middle of creating. This one is for my Wayne Colburn BA2018 Linestage build. This PSU is much smaller than my previous one and uses more modern regulators.

The PCB measures 160mm x 100mm and is designed to slide straight into the rails of a Hammond 1455T2201 enclosure. Just waiting for the boards back from the fab house.

Just a few specs:

- Ultra Low Noise and Ripple thanks to a CRCRC filter.
- Full Bridge rectifier with X2 rated snubber cap.
- Enable feature to power on/off regulators with switch while leaving rest of board powered.
- Low drop out regulators with built in protection.
- LED indicators on the rails to show board has power and third LED to show ON state.
- Adjustable voltage from +/- 5v to 20v.
- Max current upto 1A dependant on transformer.
- Onboard fuse on the mains supply.

I will get a board built up when I get them for further testing.
 

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Last edited:
It's finished and working beautifully. Fully adjustable and dead silent. Now to continue with my Linestage build. 🙂
 

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Another power supply I am in the middle of creating. This one is for my Wayne Colburn BA2018 Linestage build. This PSU is much smaller than my previous one and uses more modern regulators.

The PCB measures 160mm x 100mm and is designed to slide straight into the rails of a Hammond 1455T2201 enclosure. Just waiting for the boards back from the fab house.

Just a few specs:

- Ultra Low Noise and Ripple thanks to a CRCRC filter.
- Full Bridge rectifier with X2 rated snubber cap.
- Enable feature to power on/off with momentary switch.
- Low drop out regulators with built in protection.
- LED indicators on the rails to show board has power and third LED to show ON state.
- Adjustable voltage from +/- 5v to 20v.
- Max current upto 1A dependant on transformer.
- Onboard fuse on the mains supply.

I will get a board built up when I get them for further testing.

Any schematic for this?