Footswitch
About the Footswitch PCB
Footswitch is an open source NXP PCB design by mamaheux, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 50 mm, with 61 components from 12 distinct parts.
Its main chip is the Teensy_LC, from the NXP family. Other key parts include the 74HC14 and MAX3232. By type, the board carries 24 resistors, 23 capacitors, 4 ICs, 4 transistors, 3 switches and 2 diodes.
It belongs with the audio designs in this gallery.
Main components on the Footswitch
Footswitch bill of materials (BOM)
61 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Teensy_LC | Teensy_LC | U1 |
| 2 | 74HC14 | SOIC-14_3.9x8.7mm_P1.27mm | U2, U3 |
| 1 | MAX3232 | SOIC-16_3.9x9.9mm_P1.27mm | U4 |
| 4 | TD9944 | SOIC-8_3.9x4.9mm_P1.27mm | Q1, Q2, Q3, Q4 |
| 1 | control | PinSocket_1x06_P2.54mm_Vertical | J1 |
| 3 | SPST | PinSocket_1x08_P2.54mm_Vertical | SW1, SW2, SW3 |
| 2 | LED | PinHeader_1x08_P2.54mm_Vertical | D1, D2 |
| 17 | 0.1µF/25V | C_0805_2012Metric | C1, C2, C5, C8, C9, C10, C11, C12 +9 |
| 2 | 1000µF/25V | CP_Radial_D10.0mm_P5.00mm | C3, C4 |
| 2 | 2.2µF/25V/UL low ESR | C_0805_2012Metric | C6, C7 |
| 2 | 1µF/10V/UL ESR | C_0805_2012Metric | C14, C15 |
| 24 | 10k | R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R7, R8 +16 |
Footswitch design files
The KiCad project lives in the mamaheux/bass-amplifier repository on GitHub; these links point at the commit this page was built from.
Footswitch: common questions
What microcontroller does the Footswitch use?
The Footswitch is built around the Teensy_LC, from the NXP family.
How big is the Footswitch PCB?
The Footswitch measures 100 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Footswitch?
61 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the Footswitch design files?
From the mamaheux/bass-amplifier repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Footswitch design in my own project?
Yes, under the terms of its MIT license, which mamaheux chose for the repository.
Can I test firmware for the Footswitch without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.
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