Pcb touch test
About the Pcb touch test
Pcb touch test is an open source PCB design by TimGoll, published on GitHub. It is a 2-layer board measuring 61 × 37.1 mm, with 21 components from 10 distinct parts.
Other key parts include the ttp223. By type, the board carries 6 capacitors, 4 diodes, 4 resistors, 3 ICs, 3 switches and 1 connector.
From the project
For an upcoming project I wanted to test how to implement PCB touch pads. The easiest solution that I could find was to use the TTP223 IC. All in all the design was pretty easy and straightforward.
For an upcoming project I wanted to test how to implement PCB touch pads. The easiest solution that I could find was to use the TTP223 IC. All in all the design was pretty easy and straightforward.
There were mainly three things to experiment:
does my custom touchpad footprint work? is the minimal spacing between the pads enough? * what size should the capacitor be?
Main components on the Pcb touch test
Pcb touch test bill of materials (BOM)
21 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | ttp223 | SOT-23-6_Handsoldering | U4, U5, U6 |
| 1 | I/O | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 3 | touch_button | touch_button | touch 1, touch 2, touch 3 |
| 1 | t1 | LED_0805_2012Metric_Castellated | D1 |
| 1 | t2 | LED_0805_2012Metric_Castellated | D2 |
| 1 | t3 | LED_0805_2012Metric_Castellated | D3 |
| 1 | pwr | LED_0805_2012Metric_Castellated | D4 |
| 3 | 0..50p | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3 |
| 3 | 100n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4, C5, C6 |
| 4 | 2k2 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2, R3, R4 |
Pcb touch test design files
The KiCad project lives in the TimGoll/pcb_touch_test repository on GitHub; these links point at the commit this page was built from.
Pcb touch test: common questions
How big is the Pcb touch test?
The Pcb touch test measures 61 × 37.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Pcb touch test?
21 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the Pcb touch test design files?
From the TimGoll/pcb_touch_test repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Pcb touch test design in my own project?
The repository has no license, so all rights stay with TimGoll. Use it as a reference, and ask the author before reusing the design.