8-Bit To BDC V2
About the 8-Bit To BDC V2 PCB
8-Bit To BDC V2 is an open source PCB design by Alex-Hermeling, published on GitHub. It is a 2-layer board measuring 100 × 50 mm, with 51 components from 8 distinct parts.
Other key parts include the AT28C64B-15PU and 4056. By type, the board carries 29 resistors, 11 diodes, 6 connectors and 5 ICs.
From the project
A repo to store all of the KiCad files for this project
V0.1 has many problems with the schematic and the PCB design. First, the schematic contains a mistake with both XOR segments. A wire is supposed to go from the right resistor under Q10 to 5V and from the right resistor under Q14 to 5V. Also, the design of the PCB is flawed because it is hard to hand-solder. While designing this PCB, I was too focused on saving space, which should not have been the case for the first version. The input and output holes were too small to fit any regular-size wire. All of these problems were fixed in V0.3.
Main components on the 8-Bit To BDC V2
8-Bit To BDC V2 bill of materials (BOM)
51 components, 8 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | AT28C64B-15PU | DIP1555W45P254L3733H482Q28 | U1, U2 |
| 3 | 4056 | DIP794W45P254L1969H508Q16 | U3, U4, U5 |
| 3 | Conn_01x08_Pin | PinHeader_2x04_P2.54mm_Vertical | J1, J3, J4 |
| 3 | Conn_01x02_Pin | PinHeader_1x02_P2.54mm_Vertical | J2, J5, J6 |
| 3 | WL-T7DS_0.39INCH_COMMON-CATHODE | WL-T7DS_0.39INCH | D1, D2, D3 |
| 8 | US1M | D_SOD-323_HandSoldering | D4, D5, D6, D7, D8, D9, D10, D11 |
| 8 | 10K 10k | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 |
| 21 | 330 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10, R11, R12, R13, R14, R15, R16 +13 |
8-Bit To BDC V2 design files
The KiCad project lives in the Alex-Hermeling/Transistor-Calculator repository on GitHub; these links point at the commit this page was built from.
8-Bit To BDC V2: common questions
How big is the 8-Bit To BDC V2 PCB?
The 8-Bit To BDC V2 measures 100 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 8-Bit To BDC V2?
51 components, from 8 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 8-Bit To BDC V2 design files?
From the Alex-Hermeling/Transistor-Calculator 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 8-Bit To BDC V2 design in my own project?
The repository has no license, so all rights stay with Alex-Hermeling. Use it as a reference, and ask the author before reusing the design.
More boards in Transistor-Calculator
Earlier revisions in the repo: 8-Bit_To_BDC