Not a pedal, but my latest build...

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laurie
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Not a pedal, but my latest build...

Post by laurie » Thu Jan 14, 2021 3:27 am

An adjustable power supply for testing pedals and designs.

Made using prototyping board (what I used to call "vero-board" years ago). I used speaker spring-terminals for the output - wired in parallel, I use one set to connect to the multi-meter that shows the output voltage.
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sclitheroe
Posts: 273
Joined: Sat Aug 18, 2018 2:11 am
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Re: Not a pedal, but my latest build...

Post by sclitheroe » Thu Jan 14, 2021 1:37 pm

What does the 2 watt resistor across the output do? I don't understand its function in the circuit.

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laurie
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Re: Not a pedal, but my latest build...

Post by laurie » Thu Jan 14, 2021 2:10 pm

The LM317 holds regulation better if it always has some load.

Some pedals draw only a few milliamps and the LM317 regulates correctly if it has 10mA or greater load.

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visserman
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Re: Not a pedal, but my latest build...

Post by visserman » Fri Jan 15, 2021 11:00 pm

A tool to help new creations on the way.
It looks neat Laurie! :)

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