2 layers42.2 × 81.9 mm
Atmega328p
Sujay-1010/Rover-PCB--KiCAD
Following pcb contains a rover pcb design, its schematics, its bom(bill of materials), and the working paramters of all the components used.
39 parts
2 layers33.5 × 64 mm
Biking leds
shelxty/biking_ledcustom pcb with lights that light up with the push of a button; flex pcb that can wrap around arm to protect bikers at night
- Size
- 33.5 × 64 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 29
- Pads
- 49
- Tracks, vias
- 24, 19
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 Jul 2026
- Updated
- 3 Jul 2026
Overview
Biking leds is an open-source printed circuit board by shelxty, from the shelxty/biking_led repository on GitHub. It is a 2-layer board of 33.5 × 64 mm with 10 parts on 29 nets, routed with 24 tracks and 19 vias.
It is built around the ATTINY1616-SN and TMF8820. Its parts include 3 resistors, 3 diodes and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdBikers Alarm: Safety LED & Alert System
This is a safety system created for bikers at night, utilizing a flex PCB that wraps around the arm and opens up 3 LEDs with the push of a button! Have a light on you as you're biking around at night so that cars can see you, and when you're within 5 meters of a person, a buzzer will automatically buzz to alert them of your presence/you of their presence.
Created during the Hack Club: Fallout event in Shenzhen, China
Design
Schematic
PCB Design
3D View
Bill of Materials
| Reference | Description | Value | Qty | MOQ | Price Per Unit ($) | Total Price ($) | Datasheet | Footprint | MPN | Link |
|---|---|---|---|---|---|---|---|---|---|---|
| BT1 | Single-cell battery | Battery_Cell | 1 | 1 | 3.87 | 3.87 | N/A | Battery:BatteryHolder_Keystone_3034_1x20mm | N/A | Link |
| BZ1 | Buzzer, polarized | Buzzer | 1 | 10 | 0.0572 | 0.57 | N/A | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | 1207-P6.5MM | Link |
| D1,D2,D3 | Light emitting diode | LED | 3 | 20 | 0.022 | 0.44 | N/A | LED_THT:LED_D5.0mm | BAT54,215 | Link |
| R1,R2,R3 | Resistor | 300 | 3 | 100 | 0.0016 | 0.16 | N/A | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | FRC0402J301 TS | Link |
| SW1 | Switch, single pole double throw | SW_SPDT | 1 | 20 | 0.0298 | 0.6 | N/A | N/A | 1TS005F-1600-4301A2-CT | Link |
| U1 | 20MHz, 16kB Flash, 2kB SRAM, 256B EEPROM, SOIC-20 | ATtiny1616-S | 1 | 1 | 1.71 | 1.71 | Link | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | ATTINY1616-SNR | Link |
| U2 | 5m distance ranging ToF sensor, 3x3 zones, LGA-12 | TMF8820 | 1 | 1 | 11.98 | 11.98 | Link | Sensor_Distance:AMS_OLGA12 | TMF8820-1AM | Link |
| Total | 11 | 19.33 |
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 300 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3 |
| 3 | LED | LED_THT:LED_D5.0mm | D1, D2, D3 |
| 1 | ATtiny1616-S | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U1 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | TMF8820 | Sensor_Distance:AMS_OLGA12 | U2 |
Questions
How big is the Biking leds PCB?
It measures 33.5 × 64 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Biking leds use?
10 parts, built around the ATTINY1616-SN and TMF8820. 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 Biking leds KiCad files?
From the shelxty/biking_led repository on GitHub, at the commit this page was made from: the board is pcbs/biking_leds.kicad_pcb and its schematic pcbs/biking_leds.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Biking leds design in my own project?
Its repository states no licence, so its author keeps all rights: ask shelxty before reusing the design.
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