2 layers327.9 × 139 mm
Coco2
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
147 parts446
2 layers38.3 × 31.8 mm
Servo Tester
VikramR3/Servo_TesterNE555 servo tester with pot-controlled pulse width - KiCad 9, 2-layer, 38.2 x 31.8 mm
- Size
- 38.3 × 31.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 8
- Pads
- 28
- Tracks, vias
- 44, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Aug 2026
- Updated
- 16 Aug 2026
Overview
Servo Tester is an open-source printed circuit board by VikramR3, from the VikramR3/Servo_Tester repository on GitHub, published under the MIT licence. It is a 2-layer board of 38.3 × 31.8 mm with 10 parts on 8 nets, routed with 44 tracks and 0 vias.
It is built around the NE555P. Its parts include 3 resistors, 2 diodes, 2 connectors, 1 capacitor and 1 IC. It belongs with the robots and motor control boards of this library.
Main components
1README
README.mdServo Tester
A 2-layer PCB that exercises an RC servo without a microcontroller: an NE555 astable generates the servo pulse train, and a 100 kΩ potentiometer sweeps the pulse width to drive the horn across its full travel. Designed in KiCad 9.
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 100k | Potentiometer_THT:Potentiometer_Alps_RK163_Single_Horizontal | RV1 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3 |
| 1 | 22nF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C1 |
| 1 | 3.3M | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | 56k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R2 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J1 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J2 |
| 1 | LED | LED_THT:LED_D3.0mm | D2 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U1 |
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Questions
How big is the Servo Tester PCB?
It measures 38.3 × 31.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Servo Tester use?
10 parts, built around the NE555P. 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 Servo Tester KiCad files?
From the VikramR3/Servo_Tester repository on GitHub, at the commit this page was made from: the board is Servo_Tester.kicad_pcb and its schematic Servo_Tester.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Servo Tester design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).