7 open source boards using the LM317_TO-220
Real designs built with the LM317_TO-220, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
AVR/ArduinoEV Charger
fotherja
118 × 103.5 mm53 parts2LMIT166
HF-PA-Combined
kholia
102 × 72 mm36 parts2LCustom license11
Speaker
AbdullahHendy
73.8 × 60.1 mm28 parts2LNo license1
Power v2
82.4 × 49.7 mm24 parts2LCustom license11
Relay brd
reivax-boucoi
100 × 100 mm141 parts2LNo license1- schematic only · 87 parts
Battery emulator design 0.1
KonnorKinnaman
87 parts2LNo license1 
Breadboard power supply
harris8099
30.5 × 52.8 mm17 parts2LNo license0
The LM317_TO-220 in open source designs
The gallery holds 7 open source boards using the LM317_TO-220 from 6 GitHub repositories; a typical one measures about 91.2 × 66.1 mm and carries around 36 components.
100% are two-layer designs, the rest use four layers or more, and 14% carry an open source license.
The most starred is EV Charger by fotherja.
Microcontrollers on boards using the LM317_TO-220
What boards using the LM317_TO-220 are built for
LM317_TO-220: common questions
Where can I find a LM317_TO-220 reference design?
Each of the 7 boards on this page is a real design using the LM317_TO-220. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the LM317_TO-220 use?
Most are built on AVR/Arduino (1).
How big is a typical board using the LM317_TO-220?
The median is 91.2 × 66.1 mm, and 100% are two-layer designs.
What is the most popular open source board using the LM317_TO-220?
By GitHub stars, EV Charger by fotherja, with 166 stars.
Can I simulate one of these boards using the LM317_TO-220 before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.