Simple io
About the Simple io PCB
Simple io is an open source PCB design by zuiko21, published on GitHub under the MIT license. It is a 2-layer board measuring 97.8 × 72.4 mm, with 26 components from 23 distinct parts.
Other key parts include the 74HC245. By type, the board carries 8 switches, 8 diodes, 6 resistors, 3 connectors and 1 IC.
It belongs with the retro computing designs in this gallery.
From the project
Scalable OS for 6502/65816
With great embarrassment I have to admit never having owned a 65xx computer... but suport for these classic machines shouldn't be difficult to add -- for instance, I have declared as 'reserved' the two first zero-page bytes in case the utterly popular Commodore-64 (using a 6510) is targeted.
Back to my own-designed devices, here's the range (past, present and future):
Main components on the Simple io
Simple io bill of materials (BOM)
26 components, 23 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC245 | DIP-20_W7.62mm_Socket | U1 |
| 1 | SS-22 | PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | VIAport | IDC-Header_2x20_P2.54mm_Vertical | J2 |
| 1 | TTL SERIAL | PinHeader_2x05_P2.54mm_Vertical | J3 |
| 1 | PA0 | SW_PUSH_6mm_H5mm | SW1 |
| 1 | PA1 | SW_PUSH_6mm_H5mm | SW2 |
| 1 | PA2 | SW_PUSH_6mm_H5mm | SW3 |
| 1 | PA3 | SW_PUSH_6mm_H5mm | SW4 |
| 1 | PA4 | SW_PUSH_6mm_H5mm | SW5 |
| 1 | PA5 | SW_PUSH_6mm_H5mm | SW6 |
| 1 | PA6 | SW_PUSH_6mm_H5mm | SW7 |
| 1 | PA7 | SW_PUSH_6mm_H5mm | SW8 |
| 1 | PB0 | LED_D3.0mm | D1 |
| 1 | PB1 | LED_D3.0mm | D2 |
| 1 | PB2 | LED_D3.0mm | D3 |
| 1 | PB3 | LED_D3.0mm | D4 |
| 1 | PB4 | LED_D3.0mm | D5 |
| 1 | PB5 | LED_D3.0mm | D6 |
| 1 | PB6 | LED_D3.0mm | D7 |
| 1 | PB7 | LED_D3.0mm | D8 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 22K | R_Array_SIP9 | RN1, RN6 |
| 2 | 3K3 | R_Array_SIP8 | RN2, RN3 |
| 2 | 470 | R_Array_SIP8 | RN4, RN5 |
Simple io design files
The KiCad project lives in the zuiko21/minimOS repository on GitHub; these links point at the commit this page was built from.
Simple io: common questions
How big is the Simple io PCB?
The Simple io measures 97.8 × 72.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Simple io?
26 components, from 23 distinct parts. The full bill of materials is listed on this page.
Where can I download the Simple io design files?
From the zuiko21/minimOS repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Simple io design in my own project?
Yes, under the terms of its MIT license, which zuiko21 chose for the repository.
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