aufford/ATTinySmileyFace1ATTinyFlashLEDs noSwitch is an open-source printed circuit board by aufford, from the aufford/ATTinySmileyFace repository on GitHub. It is a 2-layer board of 50 × 52.6 mm with 13 parts on 12 nets, routed with 55 tracks and 40 vias.
It is built around the ATTINY85V-10PU. Its parts include 4 resistors, 3 connectors, 2 diodes, 1 capacitor and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
** In Development ** The idea of this project is to develop a cheap microcontroller project for students.
The Kicad Project file is provided here in its entirety. You can get three of the boards fabbed up by OSHPark for $20 (as of Feb 2025), then solder the components in yourself. (Future work to reduce the price point).
You can find a basic Arduino sketch here. The idea is for the kids to make the smiley face eyes flash in whatever pattern they want.
You can open the simulation project at https://wokwi.com/projects/422974727593661441 The students can practice with different code to make the eyes blink, wink, etc. Once they have a pattern they like, we can program their ATTiny and then load it onto their board.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1M | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R3, R4 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J2 |
| 2 | LED | LED_THT:LED_D3.0mm | D1, D2 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1 |
| 1 | ATtiny85V-10P | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | LOGO | LOGO | G*** |
It measures 50 × 52.6 mm and has 2 copper layers, 1.6 mm thick.
13 parts, built around the ATTINY85V-10PU. 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.
From the aufford/ATTinySmileyFace repository on GitHub, at the commit this page was made from: the board is PCB Design/ATTinyFlashLEDs_noSwitch.kicad_pcb and its schematic PCB Design/ATTinyFlashLEDs_noSwitch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask aufford before reusing the design.
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