Front Panel
About the Front Panel PCB
Front Panel is an open source PCB design by juniperlynx, published on GitHub. It is a 2-layer board measuring 199 × 129 mm, with 38 components from 38 distinct parts.
By type, the board carries 23 switches, 12 connectors and 2 diodes.
From the project
A trainer / demonstration system for the Motorola MC14500B
The Uno 14500 is a demonstration and training system built around the Motorola MC14500BCP Industrial Control Unit.
Its design borrows heavily from several sources including the Motorola ICU Handbook, Usagi Electric's MC14500 SBC, Nicola Cimmino's PLC14500, and my original Uno computer, a CMOS CPU I wire wrapped in college.
The system has 256 bytes of program memory, an 8 bit scratch register, an 8 bit output register, and an 8 bit input mux.
Front Panel bill of materials (BOM)
38 components, 38 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SPEED | J1 | |
| 1 | INPUT SW | J2 | |
| 1 | CLK_SRC | J3 | |
| 1 | HALT | J4 | |
| 1 | RESET | J5 | |
| 1 | HALT_LED | J6 | |
| 1 | STEP | J7 | |
| 1 | DATA SW | J8 | |
| 1 | RUN | J9 | |
| 1 | LD_ADDR | J10 | |
| 1 | RUN_LED | J11 | |
| 1 | LD_INST | J12 | |
| 1 | 1M | RV1 | |
| 1 | CLK_SRC | SW1 | |
| 1 | HALT | SW2 | |
| 1 | IN7 | SW3 | |
| 1 | IN6 | SW4 | |
| 1 | IN5 | SW5 | |
| 1 | IN4 | SW6 | |
| 1 | IN3 | SW7 |
Show 18 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | IN2 | SW8 | |
| 1 | IN1 | SW9 | |
| 1 | IN0 | SW10 | |
| 1 | RESET | SW11 | |
| 1 | STEP | SW12 | |
| 1 | RUN | SW13 | |
| 1 | LD_ADDR | SW14 | |
| 1 | D7 | SW15 | |
| 1 | D6 | SW16 | |
| 1 | D5 | SW17 | |
| 1 | D4 | SW18 | |
| 1 | D3 | SW19 | |
| 1 | D2 | SW20 | |
| 1 | D1 | SW21 | |
| 1 | D0 | SW22 | |
| 1 | LD_INST | SW23 | |
| 1 | HALT | D1 | |
| 1 | RUN | D2 |
Front Panel design files
The KiCad project lives in the juniperlynx/Uno-14500 repository on GitHub; these links point at the commit this page was built from.
Front Panel: common questions
How big is the Front Panel PCB?
The Front Panel measures 199 × 129 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Front Panel?
38 components, from 38 distinct parts. The full bill of materials is listed on this page.
Where can I download the Front Panel design files?
From the juniperlynx/Uno-14500 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Front Panel design in my own project?
The repository has no license, so all rights stay with juniperlynx. Use it as a reference, and ask the author before reusing the design.
