2 layers65 × 56.5 mm
SuperPower RPi KiCAD
SensorsIot/SuperPower
Here you should find the best power supplies for your low-power projects
122 parts600
2 layers44.9 × 15 mm
Iambic controller board
dbstreif/iambic-controller-board1Custom PCB designed to interface with ATtiny85-based firmware for Morse keying
- Size
- 44.9 × 15 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 17
- Nets
- 13
- Pads
- 54
- Tracks, vias
- 103, 27
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Dec 2025
- Updated
- 30 Mar 2026
Overview
Iambic controller board is an open-source printed circuit board by dbstreif, from the dbstreif/iambic-controller-board repository on GitHub. It is a 2-layer board of 44.9 × 15 mm with 17 parts on 13 nets, routed with 103 tracks and 27 vias.
It is built around the ATTINY85-20SU. Its parts include 5 resistors, 5 diodes, 3 connectors, 2 capacitors and 2 ICs. It belongs with the interfaces and adapters boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdIambic Controller Custom Hardware
(Morse Code Keyer Hardware Interface)
A board design using ATtiny85 microcontroller that interfaces with an iambic CW keyer over TRS to USB. This project provides hardware for the firmware project found here: Iambic-Controller
To build and install on your microcontroller, please use the Arduino IDE with the Digistump additional boards manager: Digistump Additional Boards Manager
Compatibility
Plug and play with VBand, MorseIT (IOS/Android), MorseKeyer Software (PC), and many other applications.
Shield: 
This work is licensed under a Creative Commons Attribution 4.0 International License.
Parts
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1K | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | 3V6 | Diode_SMD:D_SOD-323 | D2, D3 |
| 2 | 68R | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 1K5 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 1N5819 | Diode_SMD:D_SOD-123 | D1 |
| 1 | ATtiny85-20S | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U2 |
| 1 | AudioJack3 | Connector_Audio:Jack_3.5mm_CUI_SJ1-3515N_Horizontal | J2 |
| 1 | Header 1 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | ISP Header | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J3 |
| 1 | LED1 | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | LED2 | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | USB_A_PCB | Edge_USB_PCB:PCB_USB_A | U1 |
Questions
How big is the Iambic controller board PCB?
It measures 44.9 × 15 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Iambic controller board use?
17 parts, built around the ATTINY85-20SU. 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 Iambic controller board KiCad files?
From the dbstreif/iambic-controller-board repository on GitHub, at the commit this page was made from: the board is iambic-controller-board.kicad_pcb and its schematic iambic-controller-board-version1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Iambic controller board design in my own project?
Its repository states no licence, so its author keeps all rights: ask dbstreif before reusing the design.
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