2 layers60 × 30 mm
Controller
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
11 parts3kApache-2.0
2 layers127 × 112.7 mm
Toggler
khaled-muhammad/solderThe LEDs blink alternately with a delay, controlled purely by electronic components.
- Size
- 127 × 112.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 8
- Pads
- 25
- Tracks, vias
- 69, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Jun 2025
- Updated
- 25 Jun 2025
Overview
Toggler is an open-source printed circuit board by khaled-muhammad, from the khaled-muhammad/solder repository on GitHub. It is a 2-layer board of 127 × 112.7 mm with 11 parts on 8 nets, routed with 69 tracks and 0 vias.
Its parts include 4 resistors, 2 capacitors, 2 diodes and 2 transistors.
README
README.mdTwo Bulb Blinker PCB — First Ever Soldered Project
Project Description
This is my first PCB project ever! I built a simple two-bulb blinker with a small delay, using only transistors and capacitors — no microcontrollers!
The LEDs blink alternately with a delay, controlled purely by electronic components.
🔧 Bill of Materials (BOM)
| Component | Quantity | Value / Type |
|---|---|---|
| LED | 2 | 5mm Any Color |
| NPN Transistor | 2 | 2N3904 |
| Resistor (LED) | 2 | 220Ω |
| Resistor (Base) | 2 | 47kΩ |
| Capacitor | 2 | 10uF |
| Power Supply | 1 | CR2032 Battery |
Schematic
3D View
PCB Layout
My Info
- Slack Member ID:
U08QKDF6F9B - Slack Full Name: Khaled Muhammad Ibrahim
- Slack Display Name: Khaled
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4 |
| 2 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2 |
| 2 | C | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C1, C2 |
| 2 | LED | LED_THT:LED_D5.0mm | D1, D2 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
Questions
How big is the Toggler PCB?
It measures 127 × 112.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Toggler use?
11 parts. 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 Toggler KiCad files?
From the khaled-muhammad/solder repository on GitHub, at the commit this page was made from: the board is toggler/toggler.kicad_pcb and its schematic toggler/toggler.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Toggler design in my own project?
Its repository states no licence, so its author keeps all rights: ask khaled-muhammad before reusing the design.
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