Tandy1000ex hx ram
About the Tandy1000ex hx ram PCB
Tandy1000ex hx ram is an open source PCB design by misterblack1, published on GitHub. It is a 2-layer board measuring 57.2 × 84.5 mm, with 17 components from 13 distinct parts.
Other key parts include the AS6C4008-55PCN, 74LS00, 74LS32 and 74LS245. By type, the board carries 5 capacitors, 4 ICs, 3 resistors, 2 connectors, 2 jumpers and 1 diode.
From the project
Tandy 1000EX/HX RAM Expansion Board
Tandy 1000 EX/HX RAM Expansion Board by Adrian Black. Cheap and simple, only requires 4 IC's (3 if you choose to bypass the 74LS245 with jumper links.)
You can leave off the LED and R3 if you don't want the LED. This is tested in both the Tandy 1000 EX and HX machines. If you use 74HCT logic, you can substitute 10k resistors for R1 and R2.
See the video about the board at: https://www.youtube.com/watch?v=l3RWOZX58A8
Main components on the Tandy1000ex hx ram
Tandy1000ex hx ram bill of materials (BOM)
17 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AS6C4008-55PCN | DIP-32_W15.24mm | U1 |
| 1 | 74LS00 | DIP-14_W7.62mm | U2 |
| 1 | 74LS32 | DIP-14_W7.62mm | U4 |
| 1 | 74LS245 | DIP-20_W7.62mm | U5 |
| 1 | Tandy_Expansion | PinSocket_2x31_P2.54mm_Vertical | J1 |
| 1 | Tandy_Expansion | PinHeader_2x31_P2.54mm_Vertical | J2 |
| 1 | Enable UMB | PinSocket_1x02_P2.54mm_Vertical | JP1 |
| 1 | 96k/128k UMB | PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | RAM Access | LED_D3.0mm | D1 |
| 4 | 0.1uf | C_Rect_L4.0mm_W2.5mm_P2.50mm | C1, C2, C3, C4 |
| 1 | 47uf | CP_Radial_D4.0mm_P2.00mm | C5 |
| 2 | 4.7k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 1 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
Tandy1000ex hx ram design files
The KiCad project lives in the misterblack1/tandy1000ex-hx-ram repository on GitHub; these links point at the commit this page was built from.
Tandy1000ex hx ram: common questions
How big is the Tandy1000ex hx ram PCB?
The Tandy1000ex hx ram measures 57.2 × 84.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Tandy1000ex hx ram?
17 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the Tandy1000ex hx ram design files?
From the misterblack1/tandy1000ex-hx-ram repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Tandy1000ex hx ram design in my own project?
The repository has no license, so all rights stay with misterblack1. Use it as a reference, and ask the author before reusing the design.