RC1802 Keypad
About the RC1802 Keypad PCB
RC1802 Keypad is an open source PCB design by tebl, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 78.1 × 85.7 mm, with 17 components from 17 distinct parts.
By type, the board carries 16 switches and 1 connector.
It belongs with the retro computing designs in this gallery.
From the project
With the RC6502-project for making an Apple 1 replica done I wanted to do something different, so I started designing a simple version of the RCA 1802-based Cosmac ELF instead.
Toggling in a lot of data, or even just a little bit of data using switches can be a lot of fun... and a lot of work! So in order to keep the fun going I've started experimenting with better switches, this time added the slightly bit newer method of using a hex keypad. This one sort of goes against my design principles of only using the cheapest available alternatives, but only just about by using Gateron keyboard switches instead of those tactile momentary switches. Should be fun!
RC1802 Keypad bill of materials (BOM)
17 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | KB | Pin_Header_Straight_2x04_Pitch2.54mm | J1 |
| 1 | Ø | SW_Cherry_MX_1.00u_PCB | SW1 |
| 1 | 7 | SW_Cherry_MX_1.00u_PCB | SW2 |
| 1 | E | SW_Cherry_MX_1.00u_PCB | SW3 |
| 1 | 1 | SW_Cherry_MX_1.00u_PCB | SW4 |
| 1 | 8 | SW_Cherry_MX_1.00u_PCB | SW5 |
| 1 | F | SW_Cherry_MX_1.00u_PCB | SW6 |
| 1 | 2 | SW_Cherry_MX_1.00u_PCB | SW7 |
| 1 | 9 | SW_Cherry_MX_1.00u_PCB | SW8 |
| 1 | 3 | SW_Cherry_MX_1.00u_PCB | SW10 |
| 1 | A | SW_Cherry_MX_1.00u_PCB | SW11 |
| 1 | 4 | SW_Cherry_MX_1.00u_PCB | SW13 |
| 1 | B | SW_Cherry_MX_1.00u_PCB | SW14 |
| 1 | 5 | SW_Cherry_MX_1.00u_PCB | SW16 |
| 1 | C | SW_Cherry_MX_1.00u_PCB | SW17 |
| 1 | 6 | SW_Cherry_MX_1.00u_PCB | SW19 |
| 1 | D | SW_Cherry_MX_1.00u_PCB | SW20 |
RC1802 Keypad design files
The KiCad project lives in the tebl/RC1802-Cosmac-ELF repository on GitHub; these links point at the commit this page was built from.
RC1802 Keypad: common questions
How big is the RC1802 Keypad PCB?
The RC1802 Keypad measures 78.1 × 85.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RC1802 Keypad?
17 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the RC1802 Keypad design files?
From the tebl/RC1802-Cosmac-ELF repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the RC1802 Keypad design in my own project?
Yes, under the terms of its GPL-3.0 license, which tebl chose for the repository.
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