RC1 TMS9918A
About the RC1 TMS9918A PCB
RC1 TMS9918A is an open source PCB design by tebl, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 99.1 × 76.8 mm, with 32 components from 19 distinct parts.
Other key parts include the TMS9918A, HM62256BLP-7, 74LS138, 74HCT04 and 74LS374. By type, the board carries 13 capacitors, 8 ICs, 4 connectors, 3 resistors, 1 transistor and 1 crystal.
It belongs with the retro computing and displays & leds designs in this gallery.
From the project
A recreation of the MOS KIM-1 microcomputer, the start of the Commodore-line of computers. Complete with hex keypad, six digit displays and a lot of 8-bit fun!
Display card based on the TMS9918A chip created by Texas Instruments.
Main components on the RC1 TMS9918A
RC1 TMS9918A bill of materials (BOM)
32 components, 19 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TMS9918A | DIP-40_W15.24mm_Socket_LongPads | U1 |
| 1 | HM62256BLP-7 | DIP-28_W15.24mm_Socket_LongPads | U2 |
| 2 | 74LS138 | DIP-16_W7.62mm_Socket | U3, U4 |
| 1 | 74HCT04 | DIP-14_W7.62mm_Socket | U5 |
| 3 | 74LS374 | DIP-20_W7.62mm_Socket | U6, U7, U8 |
| 1 | 2N3904 | TO-92_Molded_Narrow | Q1 |
| 1 | 10.738738635 MHz | Crystal_HC49-4H_Vertical | Y1 |
| 1 | Expansion | Pin_Header_Angled_1x39_Pitch2.54mm | J1 |
| 1 | ADDRESS | Pin_Header_Straight_2x06_Pitch2.54mm | J2 |
| 1 | INT_SEL | Pin_Header_Straight_2x02_Pitch2.54mm | J3 |
| 1 | VIDEO | CUI_RCJ-013 | J4 |
| 1 | 1n4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | BEAD | L_Axial_L7.0mm_D3.3mm_P10.16mm_Horizontal_Fastron_MICC | L1 |
| 9 | 100nF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +1 |
| 2 | 33pF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C9, C10 |
| 1 | 22uF | CP_Radial_D5.0mm_P2.50mm | C11 |
| 1 | 220uF | CP_Radial_D5.0mm_P2.50mm | C13 |
| 1 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 2 | 75 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3 |
RC1 TMS9918A design files
The KiCad project lives in the tebl/RC-ONE repository on GitHub; these links point at the commit this page was built from.
RC1 TMS9918A: common questions
How big is the RC1 TMS9918A PCB?
The RC1 TMS9918A measures 99.1 × 76.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RC1 TMS9918A?
32 components, from 19 distinct parts. The full bill of materials is listed on this page.
Where can I download the RC1 TMS9918A design files?
From the tebl/RC-ONE repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the RC1 TMS9918A design in my own project?
Yes, under the terms of its CERN-OHL-1.2 license, which tebl chose for the repository.
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