2 layers99.6 × 95 mm
MicroKit09 IO
electrickery/MicroKit09MK2
A recreation of an MC6809 Single Board Computer from the 1980's
77 parts1
2 layers62.2 × 49.5 mm
MicroKit09Serial
electrickery/MicroKit09MK21A recreation of an MC6809 Single Board Computer from the 1980's
- Size
- 62.2 × 49.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 17
- Nets
- 69
- Pads
- 164
- Tracks, vias
- 365, 28
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 15 Apr 2021
- Updated
- 4 Sep 2025
Overview
MicroKit09Serial is an open-source printed circuit board by electrickery, from the electrickery/MicroKit09MK2 repository on GitHub. It is a 2-layer board of 62.2 × 49.5 mm with 17 parts on 69 nets, routed with 365 tracks and 28 vias.
It is built around the MC6840CP and 100UF/16V. Its parts include 7 connectors, 6 capacitors, 3 ICs and 1 crystal. It belongs with the computers and single-board computers boards of this library.
Main components
2README
README.mdDescription
In several 1983 editions of the French computer magazine 'Led' an MC6809 single board computer was published, supporting a 6-digit, 7-segment Led display and 34 keys. The original has a 2 kByte monitor ROM and 2 kByte RAM.
Most published material can be found here: https://lab.nethence.com/frederic/Microit09/
This is a recreation, with a smaller footprint and some room for expansion.
The original, published monitor version is 1.8. This repository contains my minor enhancements.
My webpage on the subject can be found here: http://electrickery.nl/comp/microKit09/
Parts
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C3, C4, C6 |
| 2 | 22pF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2 |
| 1 | 100uF/16V | Capacitor_THT:CP_Radial_Tantal_D5.0mm_P5.00mm | C5 |
| 1 | 2.4576MHz | Crystal:Crystal_HC49-U_Vertical | Y1 |
| 1 | 4060N | Package_DIP:DIP-16_W7.62mm | U2 |
| 1 | ACIA_INT | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | BaudrateSelect | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J4 |
| 1 | ExpansionConnector | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical_CW | J1 |
| 1 | MC6840 | Package_DIP:DIP-28_W15.24mm_Socket | U3 |
| 1 | MC6850 | Package_DIP:DIP-24_W15.24mm_Socket | U1 |
| 1 | PTM | Connector_PinHeader_2.54mm:PinHeader_1x11_P2.54mm_Vertical | J7 |
| 1 | PTM_INT | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J5 |
| 1 | Serial | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | TRACE_INT | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J6 |
Questions
How big is the MicroKit09Serial PCB?
It measures 62.2 × 49.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MicroKit09Serial use?
17 parts, built around the MC6840CP and 100UF/16V. 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 MicroKit09Serial KiCad files?
From the electrickery/MicroKit09MK2 repository on GitHub, at the commit this page was made from: the board is PCBs/MicroKit09Serial/MicroKit09Serial.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the MicroKit09Serial design in my own project?
Its repository states no licence, so its author keeps all rights: ask electrickery before reusing the design.
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