Transistor 8-Bit Tri-State Circuit
About the Transistor 8-Bit Tri-State Circuit PCB
Transistor 8-Bit Tri-State Circuit is an open source PCB design by DragonMinded, published on GitHub. It is a 2-layer board measuring 63.5 × 91.4 mm, with 84 components from 9 distinct parts.
By type, the board carries 49 transistors, 27 resistors, 6 connectors and 2 capacitors.
From the project
Hardware and software files for the MiniDragon CPU.
Schematics, hardware simulator and software files for the MiniDragon CPU. This is a from-scratch CPU that I designed and am implementing using transistors, capacitors, resistors and diodes. The goal is to make an 8-bit CPU that could be used for general-purpose computing. There are a lot of toy instruction sets floating around on the web. I chose instead to design my own, loosely based off of the PDP and 6502. It is a single accumulator design with a pair of 16-bit stack pointers and a pair of temporary 8-bit registers. Instructions are 8 bits, operands are 8 bits from memory, temporary…
Transistor 8-Bit Tri-State Circuit bill of materials (BOM)
84 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 49 | 2N2222 | TO-92_Inline | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +41 |
| 3 | Power | PinHeader_1x02_P2.54mm_Vertical | J1, J2, J3 |
| 1 | EN | PinHeader_1x01_P2.54mm_Vertical | J4 |
| 1 | IN | PinHeader_1x08_P2.54mm_Vertical | J5 |
| 1 | OUT | PinHeader_1x08_P2.54mm_Vertical | J6 |
| 2 | 0.1uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2 |
| 9 | 10K | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1, R4, R7, R10, R13, R16, R19, R22 +1 |
| 17 | 1K | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R2, R5, R6, R8, R9, R11, R12, R14 +9 |
| 1 | 100 | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R3 |
Transistor 8-Bit Tri-State Circuit design files
The KiCad project lives in the DragonMinded/minidragon repository on GitHub; these links point at the commit this page was built from.
Transistor 8-Bit Tri-State Circuit: common questions
How big is the Transistor 8-Bit Tri-State Circuit PCB?
The Transistor 8-Bit Tri-State Circuit measures 63.5 × 91.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Transistor 8-Bit Tri-State Circuit?
84 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the Transistor 8-Bit Tri-State Circuit design files?
From the DragonMinded/minidragon repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Transistor 8-Bit Tri-State Circuit design in my own project?
The repository has no license, so all rights stay with DragonMinded. Use it as a reference, and ask the author before reusing the design.
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