11 open source boards using the AMS1117-3V3
Real designs built with the AMS1117-3V3, 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.
STM32VNA
profdc9
100 × 85 mm178 parts2LNo license92
Memories
gipi
59.9 × 64.3 mm38 parts2LNo license29
AVR/ArduinoPlipUltimate
tehKaiN
50 × 50 mm51 parts2LGPL-2.013
ESP32WiTooth
automote
67 × 25.8 mm46 parts2LGPL-3.00
ESP32ESP32-C3 Breadboard-Adapter
alexandrebobkov
30.5 × 25.4 mm13 parts2LMIT0
ESP32ESP32-C3-BreadBoardAdapter 2025-06
52.1 × 40.6 mm31 parts2LMIT2
ESP8266Breadboard
amitesh-singh
100 × 100 mm24 parts2LGPL-3.01
ESP32ESP32-C3-BreadBoardAdapter
50.8 × 39.4 mm29 parts2LMIT2
ESP32ESP32-C3-WROOM-Node-Temperature
65 × 40 mm23 parts2LMIT2
555 toggle switch v2
29.8 × 39.8 mm18 parts2LMIT2
ESP32Esp32-c3-wroom socket
30.5 × 25.4 mm13 parts2LMIT2
How designs wire the AMS1117-3V3
Read from the KiCad layouts of 7 open source designs, one per repository: what each pin of the AMS1117-3V3 connects to, and the resistors, capacitors and other passives placed on it.
- The ADJ pin is tied to GND on 6 of 7 designs.
- The VO pin has a decoupling capacitor on 3 of 7 designs, most often 100 nF (then 10 µF).
- The VI pin has a decoupling capacitor on 3 of 7 designs, most often 10 µF.
- Pin 4 is left unconnected on 3 of 5 designs (3.3V on 2).
| Pin | Connected to | Parts on the pin |
|---|---|---|
| ADJpin 1 | Connected to: GND 86% | — |
| VOpin 2 | Connected to: 3.3V 71% |
|
| VIpin 3 | Connected to: 5V 71% · a signal 29% |
|
| Pin 4 | Connected to: Not connected 60% · 3.3V 40% | — |
Connections count pins, parts count designs; values in brackets are how many parts had that value. Designs read include VNA by profdc9, Memories by gipi, PlipUltimate by tehKaiN and 555 toggle switch v2 by alexandrebobkov.
The AMS1117-3V3 in open source designs
The gallery holds 11 open source boards using the AMS1117-3V3 from 7 GitHub repositories; a typical one measures about 52.1 × 40 mm and carries around 29 components.
100% are two-layer designs, the rest use four layers or more, and 82% carry an open source license.
The most starred is VNA by profdc9.
Parts used alongside the AMS1117-3V3
Microcontrollers on boards using the AMS1117-3V3
What boards using the AMS1117-3V3 are built for
AMS1117-3V3: common questions
Where can I find a AMS1117-3V3 reference design?
Each of the 11 boards on this page is a real design using the AMS1117-3V3. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
How is the AMS1117-3V3 ADJ pin connected?
The ADJ pin is tied to GND on 6 of 7 designs. Counted from the KiCad layouts of 7 open source designs using the AMS1117-3V3.
What decoupling capacitors do designs use on the AMS1117-3V3 VO pin?
The VO pin has a decoupling capacitor on 3 of 7 designs, most often 100 nF (then 10 µF). Counted from the KiCad layouts of 7 open source designs using the AMS1117-3V3.
What decoupling capacitors do designs use on the AMS1117-3V3 VI pin?
The VI pin has a decoupling capacitor on 3 of 7 designs, most often 10 µF. Counted from the KiCad layouts of 7 open source designs using the AMS1117-3V3.
Which microcontrollers do boards using the AMS1117-3V3 use?
Most are built on ESP32 (6), AVR/Arduino (1), ESP8266 (1) and STM32 (1).
How big is a typical board using the AMS1117-3V3?
The median is 52.1 × 40 mm, and 100% are two-layer designs.
What is the most popular open source board using the AMS1117-3V3?
By GitHub stars, VNA by profdc9, with 92 stars.
Can I simulate one of these boards using the AMS1117-3V3 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.