Cosmac toy v2
About the Cosmac toy v2 PCB
Cosmac toy v2 is an open source PCB design by kanpapa, published on GitHub. It is a 2-layer board measuring 72 × 95 mm, with 56 components from 38 distinct parts.
Other key parts include the CDP1802ACE, HM6264ALSP(300mil), 4001, 4013 and 4011. By type, the board carries 13 switches, 13 resistors, 9 LEDs, 7 ICs, 7 diodes and 4 connectors.
From the project
The COSMAC Toy Computer Version 2
USB Type-Cコネクター 電源供給用 A295-CTRPB-1:A295-CTRPB-1 https://github.com/21km43/A295-CTRPB-1KiCAD Copyright (c) 2023 Koki Mizumoto
Main components on the Cosmac toy v2
Cosmac toy v2 bill of materials (BOM)
56 components, 38 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CDP1802ACE | DIP-40_W15.24mm_Socket | U1 |
| 1 | HM6264ALSP(300mil) | DIP-28_W7.62mm_Socket | U2 |
| 1 | 4001 | DIP-14_W7.62mm | U3 |
| 1 | 4013 | DIP-14_W7.62mm | U4 |
| 1 | 4011 | DIP-14_W7.62mm | U5 |
| 1 | 74HC273 | DIP-20_W7.62mm | U6 |
| 1 | HM6264ALSP(600mil) | DIP-28_W15.24mm_Socket | U7 |
| 2 | CONN_01X20 Conn_01x20 | PinSocket_1x20_P2.54mm_Vertical | J1, J2 |
| 1 | Barrel_Jack_Switch | BarrelJack_Horizontal | J3 |
| 1 | USB-C Power | A295-CTRPB-1 | J4 |
| 1 | Battery_Cell | CH243-2032CF | BT1 |
| 1 | D0 | SW_Toggle_P2.54mm_Vertical | SW1 |
| 1 | D1 | SW_Toggle_P2.54mm_Vertical | SW2 |
| 1 | D2 | SW_Toggle_P2.54mm_Vertical | SW3 |
| 1 | D3 | SW_Toggle_P2.54mm_Vertical | SW4 |
| 1 | D4 | SW_Toggle_P2.54mm_Vertical | SW5 |
| 1 | D5 | SW_Toggle_P2.54mm_Vertical | SW6 |
| 1 | D6 | SW_Toggle_P2.54mm_Vertical | SW7 |
| 1 | D7 | SW_Toggle_P2.54mm_Vertical | SW8 |
| 1 | WAIT | SW_Toggle_P2.54mm_Vertical | SW9 |
Show 18 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CLEAR | SW_Toggle_P2.54mm_Vertical | SW10 |
| 1 | STB SW | PinHeader_1x03_P2.54mm_Vertical | SW11 |
| 1 | DMA-IN | PushSwitch | SW12 |
| 1 | R/W SW | SW_Toggle_P2.54mm_Vertical | SW13 |
| 8 | DATA_LED | LED_D3.0mm | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 |
| 1 | Q | LED_D3.0mm | LED9 |
| 5 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D6, D7 |
| 2 | 1S4 | D_A-405_P7.62mm_Horizontal | D4, D5 |
| 1 | 22P 22p | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1 |
| 1 | 0.1UF 0.1 | C_Disc_D4.7mm_W2.5mm_P5.00mm | C2 |
| 6 | 100K 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R3, R5, R6, R7, R8 |
| 1 | 2.2K 2.2k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 22K 22k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | RN100K-8 | R_Array_SIP9 | RN1 |
| 1 | RN100K-4 | R_Array_SIP5 | RN2 |
| 1 | RN2.2K-8 | R_Array_SIP9 | RN3 |
| 1 | RN10K-8 | R_Array_SIP9 | RN4 |
| 1 | RN100K-4 | R_Array_SIP5 | RN5 |
Cosmac toy v2 design files
The KiCad project lives in the kanpapa/cosmac_toy_v2 repository on GitHub; these links point at the commit this page was built from.
Cosmac toy v2: common questions
How big is the Cosmac toy v2 PCB?
The Cosmac toy v2 measures 72 × 95 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Cosmac toy v2?
56 components, from 38 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Cosmac toy v2 design files?
From the kanpapa/cosmac_toy_v2 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Cosmac toy v2 design in my own project?
The repository has no license, so all rights stay with kanpapa. Use it as a reference, and ask the author before reusing the design.