16 open source boards using the TL431LP
Real designs built with the TL431LP, 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.
RP2040/RP2350GuitarPico
profdc9
100 × 100 mm127 parts2LNo license49- schematic only · 102 parts
Eurorack-PT2399-Delay
DIYSynthMNL
102 partsNo license10 
Sincos interpolator
finngineering
100 × 50 mm57 parts2LMIT5
Bluepill design
thesunRider
83.5 × 95.5 mm66 parts2LMIT3
ESP32Dc load
Fyfar
166.4 × 70.3 mm50 parts2LNo license2
Auto-SMPS
Shreyas-k-p
281.3 × 131.5 mm93 parts2LNo license1
Buck
fberni21
88.4 × 81 mm68 parts2LNo license1
NXPExoskeleton
Bihyungbetter
114.3 × 134.5 mm55 parts4LNo license0
Buck realimentada2
Balta-Etche-FIUBA
95 × 89 mm54 parts2LNo license0
PICBidirectional Power Converter 24V-12V with BMS
kwiecinski
99.5 × 99.5 mm156 parts2LMIT3
AVR/Arduino328p design
76 × 88 mm51 parts2LMIT3
Fuente
64.4 × 41.1 mm39 parts2LNo license1
Regulador Lineal
64 × 51 mm27 parts2LNo license0
Carga activa
73.5 × 40.3 mm33 parts2LNo license1
PICMisc
99.5 × 99.5 mm152 parts2LMIT3
Pwm
43.9 × 54.9 mm22 parts2LNo license1
The TL431LP in open source designs
The gallery holds 16 open source boards using the TL431LP from 10 GitHub repositories; a typical one measures about 95 × 88 mm and carries around 56 components.
93% are two-layer designs, the rest use four layers or more, and 31% carry an open source license.
The most starred is GuitarPico by profdc9.
Parts used alongside the TL431LP
Microcontrollers on boards using the TL431LP
What boards using the TL431LP are built for
TL431LP: common questions
Where can I find a TL431LP reference design?
Each of the 16 boards on this page is a real design using the TL431LP. 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 TL431LP?
The L7805, LM358, IR2104, LM317_TO-220 and LM7805_TO220 appear in the most repositories here.
Which microcontrollers do boards using the TL431LP use?
Most are built on PIC (2), AVR/Arduino (1), ESP32 (1) and NXP (1).
How big is a typical board using the TL431LP?
The median is 95 × 88 mm, and 93% are two-layer designs.
What is the most popular open source board using the TL431LP?
By GitHub stars, GuitarPico by profdc9, with 49 stars.
Can I simulate one of these boards using the TL431LP 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.