2 layers50.2 × 73 mm
2 layers54 × 45.1 mm
Licznik
rhn/jazda14DIY open source bicycle computer
- Size
- 54 × 45.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 25
- Pads
- 92
- Tracks, vias
- 268, 6
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 11 Aug 2010
- Updated
- 23 Dec 2018
Overview
Licznik is an open-source printed circuit board by rhn, from the rhn/jazda repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 54 × 45.1 mm with 25 parts on 25 nets, routed with 268 tracks and 6 vias.
It is built around the ATMEGA168A-AU. Its parts include 7 capacitors, 6 resistors, 6 switches, 4 connectors and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
READMEJazda is a bicycle computer based on AVR microcontrollers and mobile phone screens. The project covers both the software and hardware design, providing the source code and schematics. Originally, it was built around AtTiny2313, now it's AtMega8. The microcontrollers were chosen because of their popularity and resistance to damage. The other significant component is the screen. The project aims to be compatible with at least a few popular low-powered displays in the future, but at the moment only one is supported.
Project page: https://github.com/rhn/jazda Project wiki: https://github.com/rhn/jazda/wiki/ Introduction, tutorial and hardware documents: http://rhn.github.com/jazda/
FEATURES
5 speed measuring functions: current, max, average etc Cadence measurement Plotting as you ride Low power consumption DIY hardware Modular code design
ASSEMBLY
For hardware needed to assemble the device, see docs/hardware The schematics are available in Eagle format in eagle directory AND on the project page (PNG format). You will need an AVR programmer to upload the software to the chip!
SOFTWARE BUILDING
Linux: To build & upload the software, you need:
- avr-gcc
- avr-libc
- avrdude
- Unix shell
- Connect the AtMega8 chip to your computer using your programmer (refer to the programmer's manual)
- Consult avrdude manual to find your programmer's name (in this example, it's "usbasp")
- Issue the commands: cd src sh ../build.sh usbasp m8 main.c replacing "usbasp" with your programmer's name
AUTHORS rhn@porcupinefactory.org
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1K | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6 |
| 3 | 1µF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3 |
| 3 | 1µF | Capacitor_SMD:C_0805_2012Metric | C4, C5, C6 |
| 1 | 100µF | Capacitor_SMD:C_1210_3225Metric_Pad1.42x2.65mm_HandSolder | C7 |
| 1 | 2xAA (2.8V) | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 1 | ATmega168 | Package_DIP:DIP-28_W7.62mm | U1 |
| 1 | Backlight | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW3 |
| 1 | Crank | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | SW2 |
| 1 | Display | Licznik:Nokia screen | J1 |
| 1 | Left | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW6 |
| 1 | Micro_SD_Card_Det | Licznik:SD_pins | J2 |
| 1 | Right | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW4 |
| 1 | Select | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW5 |
| 1 | Serial CS1 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Horizontal | J3 |
| 1 | Serial CS2 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Horizontal | J4 |
| 1 | Wheel | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | SW1 |
Questions
How big is the Licznik PCB?
It measures 54 × 45.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Licznik use?
25 parts, built around the ATMEGA168A-AU. 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 Licznik KiCad files?
From the rhn/jazda repository on GitHub, at the commit this page was made from: the board is kicad/licznik.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Licznik design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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