MainTester
About the MainTester PCB
MainTester is an open source PCB design by Phunkafizer, published on GitHub under the MIT license. It is a 2-layer board measuring 67.4 × 44.8 mm, with 29 components from 14 distinct parts.
Other key parts include the ULN2003. By type, the board carries 9 diodes, 9 resistors, 5 switches, 3 connectors, 2 crystals and 1 IC.
It belongs with the usb & debug tools and iot & wireless designs in this gallery.
From the project
An universal sophisticated USB-serial converter
SEE PROJECTHOMEPAGE UNDER https://www.seegel-systeme.de/2025/07/10/allserial
Over the course of time I had to work with many different devices which had to be connected via a kind of serial interface. There are lots of different cheap USB-serial adapters available, but no adapter was including all features I needed in a single device. Every USB-serial adapter has in common the USB Controller. So I came up with the idea having a masterboard providing all the common features like USB interface, isolation and diagnostic elements. The most used interfaces (RS232, RS485, TTL UART, TTY current…
Main components on the MainTester
MainTester bill of materials (BOM)
29 components, 14 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ULN2003 | SO-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | ALLSERIALSLAVE | SlaveBoard | X1 |
| 1 | ALLSERIALSLAVE | Master PinSocket | X2 |
| 1 | Conn_01x06 | PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | Conn_01x10 | PinHeader_2x05_P2.54mm_Vertical | J2 |
| 1 | Conn_01x01 | PinHeader_1x01_P2.54mm_Vertical | J3 |
| 5 | 4.3mm | SW_SPST_PTS645 | SW1, SW2, SW3, SW4, SW5 |
| 5 | rd | LED_0805_2012Metric | D1, D2, D3, D4, D9 |
| 3 | yl | LED_0805_2012Metric | D5, D6, D7 |
| 1 | gn | LED_0805_2012Metric | D8 |
| 1 | 120 | R_0805_2012Metric | R1 |
| 6 | 270 | R_0805_2012Metric | R2, R5, R6, R7, R8, R9 |
| 1 | 1k | R_0805_2012Metric | R3 |
| 1 | 22k | R_0805_2012Metric | R4 |
MainTester design files
The KiCad project lives in the Phunkafizer/AllSerial repository on GitHub; these links point at the commit this page was built from.
MainTester: common questions
How big is the MainTester PCB?
The MainTester measures 67.4 × 44.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MainTester?
29 components, from 14 distinct parts. The full bill of materials is listed on this page.
Where can I download the MainTester design files?
From the Phunkafizer/AllSerial repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the MainTester design in my own project?
Yes, under the terms of its MIT license, which Phunkafizer chose for the repository.
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