Electronics > Beginners
First pcb
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hugo:
You can also add an extra diode, which is suposed to protect the LM317 regulator.  ;)   
MarkF:
While following this thread, I realized that I have a need for a small adjustable supply for one of my projects.  I used a 10-turn pot to adjust the voltage and added an input jack for a wall-wart.  I may or may not populate all the input/output jacks.
Here is the PCB that I've ended up with:
james_s:
Looks good, although you can buy small modules that are effectively a switchmode version of that for about a buck shipped from China so unless you need a specific form factor or just want the design/layout practice it likely makes more sense to just buy one.
Mr. Scram:

--- Quote from: james_s on May 16, 2018, 04:21:05 pm ---Looks good, although you can buy small modules that are effectively a switchmode version of that for about a buck shipped from China so unless you need a specific form factor or just want the design/layout practice it likely makes more sense to just buy one.

--- End quote ---
Not having switchmode noise could be an advantage.
james_s:
You can get linear versions too.

https://www.ebay.com/itm/LM317-DC-DC-Linear-Step-down-Voltage-Regulator-Power-Supply-Module-5V-9V-12V-24V/222697536114?

It's fun to build stuff, but jeez, it's hard to buy the regulator alone for the price of the whole module shipped.
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