2 layers65 × 30 mm
Rgb to hdmi
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
36 parts1kGPL-3.0
2 layers
Tinyfinger
tiband/tinyfingerATtiny45-powered device to produce pseudorandom numbers (with case)
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 42
- Pads
- 120
- Tracks, vias
- 264, 10
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 20 Feb 2018
- Updated
- 20 Feb 2018
Overview
Tinyfinger is an open-source printed circuit board by tiband, from the tiband/tinyfinger repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board with 36 parts on 42 nets, routed with 264 tracks and 10 vias.
Its parts include 16 resistors, 3 ICs, 1 capacitor, 1 connector and 1 switch. It belongs with the AVR (ATmega, ATtiny) boards of this library.
README
README.mdTinyFinger
TinyFinger is a small device powered by an ATtiny45 to produce pseudorandom numbers for selecting student groups during the computer science hardware courses at Leipzig University.
board
The board is designed in KiCad and uses a single sided pcb layout using mostly SMD components. The routing was done manually.
code
The firmware for the ATtiny is written as an Arduino sketch using the ATTinyCore board definitions. It uses a linear congruential generator for generating pseudorandom numbers and transforms them to the needed range using the gcc uniform_int_dist c++std implementation.
Flashing the firmware can be done using a normal Arduino programmes as an ISP with the ArduinoISP example sketch included with the IDE. The PINs on the board are from left to right: GND, MISO, VCC, SCK, MOSI, RESET.
case
The case is modelled in Blender and intended for 3d printing, e.g. using Cura after exporting the model as an stl file.
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | R_Small | Resistors_SMD:R_0805_HandSoldering | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 |
| 2 | 74LS595 | Housings_DIP:DIP-16_W7.62mm_LongPads | U1, U2 |
| 2 | 7SEGMENTS | Displays_7-Segment:7SegmentLED_LTS6760_LTS6780 | AFF1, AFF2 |
| 1 | ATTINY13-S | Housings_SOIC:SOIJ-8_5.3x5.3mm_Pitch1.27mm | IC1 |
| 1 | CONN_01X06 | Pin_Headers:Pin_Header_Angled_1x06 | P1 |
| 1 | C_Small | Capacitors_SMD:C_0805_HandSoldering | C1 |
| 1 | G*** | tinyfp:tinyfinger | svg2mod |
| 1 | SW_PUSH | tinyfp:Switch_Shadow_Legostyle | SW1 |
The 25 most common of 36 parts.
Questions
What parts does the Tinyfinger use?
36 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 Tinyfinger KiCad files?
From the tiband/tinyfinger repository on GitHub, at the commit this page was made from: the board is board/tinyfinger.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tinyfinger 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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