External drive board
About the External drive board
External drive board is an open source PCB design by MEGA65, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 30 components from 13 distinct parts.
Other key parts include the 74LS125, 74LS85, 74LS595, 74LS165 and 74LS04. By type, the board carries 16 resistors, 6 ICs, 6 connectors, 1 switch and 1 diode.
From the project
Expansion board for the MEGA65 R3+ Main Boards
Main components on the External drive board
External drive board bill of materials (BOM)
30 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS125 | DIP-14_W7.62mm | U1 |
| 1 | 74LS85 | DIP-16_W7.62mm | U2 |
| 1 | 74LS595 | DIP-16_W7.62mm | U3 |
| 2 | 74LS165 | DIP-16_W7.62mm | U4, U6 |
| 1 | 74LS04 | DIP-14_W7.62mm | U5 |
| 2 | MD-90SM | CUI_MD-90SM | J1, J2 |
| 1 | Conn_02x17_Odd_Even | PinHeader_2x17_P2.54mm_Vertical | J3 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 2 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J5, J7 |
| 1 | SW_DIP_x04 | DIP-16_W7.62mm | SW1 |
| 1 | LED | LED_D5.0mm | D1 |
| 14 | 3K3 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8 +6 |
| 2 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10, R12 |
External drive board design files
The KiCad project lives in the MEGA65/mega65-r3-expansion-board repository on GitHub; these links point at the commit this page was built from.
External drive board: common questions
How big is the External drive board?
The External drive board measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the External drive board?
30 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the External drive board design files?
From the MEGA65/mega65-r3-expansion-board repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the External drive board design in my own project?
The repository has no license, so all rights stay with MEGA65. Use it as a reference, and ask the author before reusing the design.
