Save a-Term
About the Save a-Term PCB
Save a-Term is an open source PCB design by inmbolmie, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 79 × 106 mm, with 22 components from 14 distinct parts.
Other key parts include the L7805. By type, the board carries 10 resistors, 4 connectors, 3 capacitors, 2 switches, 1 IC and 1 buzzer.
It belongs with the keyboards designs in this gallery.
From the project
Hardware for a PS/2 to 5251 and 3278 reverse keyboard adapter based on a TMK controller fork
Hardware for an IBM 5251 and 3278 reverse keyboard adapter to use a regular PS/2 keyboard with the original terminals. Based on my TMK controller fork (https://github.com/inmbolmie/ps2to4704_converter)
You got a pretty vintage 5251 or 3278 terminal but it lacks the original keyboard. The original keyboards are very expensive and sought-after items that can easily go for thousands of dollars. This adapter tries to solve that problem giving a way to use a cheap standard PS/2-like keyboard with the original terminals.
Main components on the Save a-Term
Save a-Term bill of materials (BOM)
22 components, 14 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | L7805 | TO-220-3_Vertical | U1 |
| 1 | PS/2 connector | Connector_Mini-DIN_Female_6Pin_2rows | J2 |
| 1 | XT/AT connector | DIN-5 | J4 |
| 1 | Terminal connector | DIN-6 | J5 |
| 1 | Terminal connector (RJ45) | RJ45_Ninigi_GE | J6 |
| 1 | PROMICRO | SPARKFUN_PRO_MICRO | B1 |
| 1 | Buzzer | Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | C221880 Reset | SW_Push_1P1T_NO_6x6mm_H9.5mm | SW1 |
| 1 | Keyboard ID | Dip SW lateral 4 | SW2 |
| 2 | 10UF 10uF | C_1206_3216Metric | C1, C2 |
| 1 | 100NF 100nF | C_0603_1608Metric | C3 |
| 7 | 2K | R_0603_1608Metric | R1, R2, R3, R4, R5, R9, R10 |
| 2 | 10K | R_0603_1608Metric | R6, R7 |
| 1 | 500 | RES-ADJ-SMD_G43BT | R8 |
Save a-Term design files
The KiCad project lives in the inmbolmie/Save-a-Term repository on GitHub; these links point at the commit this page was built from.
Save a-Term: common questions
How big is the Save a-Term PCB?
The Save a-Term measures 79 × 106 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Save a-Term?
22 components, from 14 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 Save a-Term design files?
From the inmbolmie/Save-a-Term 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 Save a-Term design in my own project?
Yes, under the terms of its GPL-3.0 license, which inmbolmie chose for the repository.
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