2 layers100 × 61 mm
2 layers70 × 14 mm
Touch pad
cycfi/touch_padKiCad PCB project — part of the Cycfi Connect series (umbrella repo: cycfi/connect)
- Size
- 70 × 14 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 10
- Pads
- 40
- Tracks, vias
- 75, 15
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 23 Jul 2026
- Updated
- 23 Jul 2026
Overview
Touch pad is an open-source printed circuit board by cycfi, from the cycfi/touch_pad repository on GitHub. It is a 2-layer board of 70 × 14 mm with 18 parts on 10 nets, routed with 75 tracks and 15 vias.
It is built around the HT7550-1, 1N4148W and TC33X-2-503E. Its parts include 9 resistors, 3 capacitors, 2 ICs, 1 diode and 1 connector.
Main components
3
HT7550-1
SOT-89-3-40℃~+85℃@(Ta) 1 150mA 2.5uA 25mV@(1mA) 30V 5V Fixed Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSHOLTEKVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
TC33X-2-503E
SMD-3P,3.8x3.6mm1 100mW 50kΩ ±25% ±250ppm/℃ SMD-3P,3.8x3.6mm Potentiometers, Variable Resistors ROHSBournsPotentiometers & Variable Resistors
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100K | Resistor_SMD:R_0402_1005Metric | R5, R6, R7, R8 |
| 3 | 1K | Resistor_SMD:R_0402_1005Metric | R3, R4, R9 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | FSR 400 | cycfi_library:FSR-400 | R1, R2 |
| 1 | 100nF | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D1 |
| 1 | HT7550-1 | Package_TO_SOT_SMD:SOT-89-3 | U1 |
| 1 | I/O connector | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical_SMD_Pin1Left | J1 |
| 1 | LOGO | cycfi_library:cycfi-logo-12mm | G*** |
| 1 | TC33X-2-503E | cycfi_library:TC33X-2 | RV1 |
| 1 | TLV6001UIDBVR | Package_TO_SOT_SMD:SOT-23-5 | U2 |
Questions
How big is the Touch pad PCB?
It measures 70 × 14 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Touch pad use?
18 parts, built around the HT7550-1, 1N4148W and TC33X-2-503E. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Touch pad KiCad files?
From the cycfi/touch_pad repository on GitHub, at the commit this page was made from: the board is touch_pad.kicad_pcb and its schematic touch_pad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Touch pad design in my own project?
Its repository states no licence, so its author keeps all rights: ask cycfi before reusing the design.
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