8 layers120 × 100 mm
4 layers27.9 × 43.2 mm
Pulse Fixed Timer
synthesissolutions/geeksforkids2- Size
- 27.9 × 43.2 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 46
- Nets
- 20
- Pads
- 120
- Tracks, vias
- 75, 175
- Pours
- 21
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 May 2019
- Updated
- 6 Sep 2026
Overview
Pulse Fixed Timer is an open-source printed circuit board by synthesissolutions, from the synthesissolutions/geeksforkids repository on GitHub. It is a 4-layer board of 27.9 × 43.2 mm with 46 parts on 20 nets, routed with 75 tracks and 175 vias.
It is built around the DRV8876PWP, MAX809R and NE555PW, with the CL05B104KB54PNC, 0402WGF1003 and CL05B103KB5NNN among its other parts. Its parts include 23 capacitors, 12 resistors, 3 ICs, 3 connectors and 2 fuses.
Main components
12
DRV8876PWP
HTSSOP-16-EP-40℃~+125℃ 1 3.5A 700mΩ 750nA Yes HTSSOP-16-EP Brushed DC Motor Drivers ROHSTexas InstrumentsMotor Driver ICs
MAX809R
SOT-23-40℃~+85℃ 1 1V~6V 2.63V 2uA 500ms Active Low No Push-pull Voltage Detector SOT-23 Supervisor and Reset ICs ROHSGRSupervisor And Reset ICs
NE555PW
TSSOP-80℃~+70℃ 100kHz 4.5V~16V TSSOP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
CL05B104KB54PNC
0402100nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
0402WGF1003
0402-55℃~+155℃ 100kΩ 50V 62.5mW Thick Film Resistor ±1% ±100ppm/℃ 0402 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface MountCL05B103KB5NNN
040210nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMTCL05A105KA5NQN
04021uF 25V X5R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
1210L075/24AR
1210-40℃~+85℃ 1.1mm 1.5A 100A 100ms 2.8mm 24V 3.5mm 400mΩ 70mΩ 750mA 900mW 1210 Resettable Fuses ROHSLUTEResettable Fuses0402WGF1001
0402-55℃~+155℃ 1kΩ 50V 62.5mW Thick Film Resistor ±1% ±100ppm/℃ 0402 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount
CL21A226MAQNNNE
080522uF 25V X5R ±20% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
CL10A106MA8NRN
060310uF 25V X5R ±20% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT0402WGF2002
0402-55℃~+155℃ 20kΩ 50V 62.5mW Thick Film Resistor ±1% ±100ppm/℃ 0402 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount
README
README.mdgeeksforkids
car_firmware - Code for RC/Joytick controlled cars
Parts
46| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C8, C12, C16, C18, C19, C21, C22 |
| 5 | 100k | Resistor_SMD:R_0402_1005Metric | R2, R3, R4, R5, R6 |
| 4 | 10nF | Capacitor_SMD:C_0402_1005Metric | C7, C10, C11, C17 |
| 3 | 1uF | Capacitor_SMD:C_0402_1005Metric | C6, C9, C14 |
| 3 | 500k | Resistor_SMD:R_0603_1608Metric | R7, R8, R9 |
| 2 | 1.5A | Fuse:Fuse_1210_3225Metric | F1, F2 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R1, R12 |
| 2 | 22uF | Capacitor_SMD:C_0805_2012Metric | C5, C13 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_2.5mm_Pad | H1, H2 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 20k | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 22nF | Capacitor_SMD:C_0402_1005Metric | C20 |
| 1 | 27k | Resistor_SMD:R_0402_1005Metric | R11 |
| 1 | 47uF | Capacitor_SMD:CP_Elec_6.3x5.4 | C23 |
| 1 | Action Input | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J1 |
| 1 | Action Output | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J2 |
| 1 | DRV8876PWPR | Package_SO:HTSSOP-16-1EP_4.4x5mm_P0.65mm_EP3.4x5mm_Mask2.46x2.31mm | U2 |
| 1 | Load | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J3 |
| 1 | MAX809R | Package_TO_SOT_SMD:SOT-23 | U3 |
| 1 | NE555PWR | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | U1 |
| 1 | SI2301CDS-T1-GE3 | Package_TO_SOT_SMD:SOT-23 | Q1 |
Questions
How big is the Pulse Fixed Timer PCB?
It measures 27.9 × 43.2 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Pulse Fixed Timer use?
46 parts, built around the DRV8876PWP, MAX809R, NE555PW and CL05B104KB54PNC. 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 Pulse Fixed Timer KiCad files?
From the synthesissolutions/geeksforkids repository on GitHub, at the commit this page was made from: the board is hardware/Action Challenges/Pulse_Fixed_Timer/Pulse_Fixed_Timer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pulse Fixed Timer design in my own project?
Its repository states no licence, so its author keeps all rights: ask synthesissolutions before reusing the design.
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