11 open source boards using the L7809
Real designs built with the L7809, 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.
STM32Mainboard
Cluradev
120 × 90 mm162 parts4LNo license119
Alim10o
acmo0
137.8 × 91.4 mm86 parts2LGPL-3.014
DIY-UPS-for-WiFi-Router
Ozonised
90 × 70 mm15 parts2LNo license7
Amplifier RD15HVF1
SatcomRadio
100 × 50 mm23 parts2LMIT4
STM32EuroSID
activexray
100 × 100 mm222 parts2LNo license3
Guitar-Amp
james-wren
184.5 × 61 mm28 parts2LMIT2
ESP32Nixie-Clock: Controller
konradmoesch
228.6 × 69.9 mm63 parts2LNo license1
Alim
84.5 × 65.3 mm60 parts2LGPL-3.014
ESP32Meowpass 0.2
hb9ezs
194.5 × 40 mm19 parts4LGPL-3.011
AVR/ArduinoLineinterrupter
profdc9
74.4 × 99.3 mm85 parts2LNo license56
AVR/ArduinoLineinterrupter
iduwhux
74.4 × 99.3 mm85 parts2LNo license1
The L7809 in open source designs
The gallery holds 11 open source boards using the L7809 from 10 GitHub repositories; a typical one measures about 100 × 70 mm and carries around 63 components.
82% are two-layer designs, the rest use four layers or more, and 45% carry an open source license.
The most starred is Mainboard by Cluradev.
Parts used alongside the L7809
Microcontrollers on boards using the L7809
What boards using the L7809 are built for
L7809: common questions
Where can I find a L7809 reference design?
Each of the 11 boards on this page is a real design using the L7809. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
What parts are used alongside the L7809?
The ATTINY85-20PU, LM339 and NE555 appear in the most repositories here.
Which microcontrollers do boards using the L7809 use?
Most are built on AVR/Arduino (2), ESP32 (2) and STM32 (2).
How big is a typical board using the L7809?
The median is 100 × 70 mm, and 82% are two-layer designs.
What is the most popular open source board using the L7809?
By GitHub stars, Mainboard by Cluradev, with 119 stars.
Can I simulate one of these boards using the L7809 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.