Chihuahua
About the Chihuahua PCB
Chihuahua 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 33 components from 29 distinct parts.
Other key parts include the 65C02, 65C22, 62256, 74HC132 and 74HC32. By type, the board carries 8 resistors, 6 connectors, 5 ICs, 4 capacitors, 3 diodes and 2 transistors.
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 Chihuahua
Chihuahua bill of materials (BOM)
33 components, 29 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 65C02 | DIP-40_W15.24mm_Socket | U1 |
| 1 | 65C22 | DIP-40_W15.24mm_Socket | U2 |
| 1 | 62256 | DIP-28_W15.24mm_Socket | U3 |
| 1 | 74HC132 | DIP-14_W7.62mm_Socket | U4 |
| 1 | 74HC32 | DIP-14_W7.62mm_Socket | U5 |
| 2 | BC548 | TO-92_Inline | Q1, Q2 |
| 1 | 1 MHz | Oscillator_DIP-8 | X1 |
| 1 | CARTRIDGE | PinSocket_2x18_EDGE | J1 |
| 1 | VIAport | IDC-Header_2x20_P2.54mm_Vertical | J2 |
| 1 | IOx | IDC-Header_2x08_P2.54mm_Vertical | J3 |
| 1 | nanoLink | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | STEP | PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | POWER | JST_EH_S2B-EH_1x02_P2.50mm_Horizontal | J6 |
| 1 | Buzzer | Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | LATCH | PinHeader_1x02_P2.54mm_Vertical | JP4 |
| 1 | RESET | SW_PUSH_6mm | SW1 |
| 1 | NMI | SW_PUSH_6mm | SW2 |
| 1 | BAT85 | D_DO-35_SOD27_P2.54mm_Vertical_KathodeUp | D1 |
| 1 | 1N4148 | D_DO-35_SOD27_P2.54mm_Vertical_AnodeUp | D2 |
| 1 | ON | LED_D3.0mm | D3 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10µ | CP_Radial_D4.0mm_P1.50mm | C1 |
| 1 | 0 | CP_Radial_D4.0mm_P1.50mm | C2 |
| 1 | 100µ | CP_Radial_D4.0mm_P1.50mm | C3 |
| 1 | 22n | C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C4 |
| 2 | 22K | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1, R2 |
| 2 | 3K3 | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3, R4 |
| 1 | 680 | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R5 |
| 1 | 4K7 | R_Array_SIP5 | RN1 |
| 2 | 3K3 | R_Array_SIP9 | RN2, RN3 |
Chihuahua design files
The KiCad project lives in the zuiko21/minimOS repository on GitHub; these links point at the commit this page was built from.
Chihuahua: common questions
How big is the Chihuahua PCB?
The Chihuahua measures 97.8 × 72.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Chihuahua?
33 components, from 29 distinct parts. The full bill of materials is listed on this page.
Where can I download the Chihuahua 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 Chihuahua design in my own project?
Yes, under the terms of its MIT license, which zuiko21 chose for the repository.
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