4116
About the 4116 PCB
4116 is an open source PCB design by tops4u, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 31.8 × 37.1 mm, with 32 components from 25 distinct parts.
Other key parts include the ICL7660ACBAZA and TLV61046ADBVR. By type, the board carries 8 capacitors, 8 resistors, 5 diodes, 4 inductors, 2 ICs and 2 transistors.
It belongs with the retro computing and power & battery designs in this gallery.
From the project
Ram Tester for vintage CBM Computer RAM Chips
This is the adapter board for testing 4116 and 4027 RAM chips. These chips require −5 V and +12 V supply voltages that the main tester board does not provide.
The RAM Tester was never originally designed to support 4116 RAM — this feature was added later due to popular demand. When designing the adapter, I wanted to make sure it would be both easy to use and safe. That's why I included LEDs to indicate when all necessary voltages are present, as 4116 RAM can be very sensitive to missing or incorrect voltages. I also added latch-up protection for the ICL7660 chip, which could otherwise lock…
Main components on the 4116
4116 bill of materials (BOM)
32 components, 25 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ICL7660ACBAZA ICL7660A | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | TLV61046ADBVR TI TLV61046A | SOT-23-6 | U3 |
| 1 | BC817 | SOT-23 | Q1 |
| 1 | BSS84 | SOT-23 | Q2 |
| 1 | Conn_01x20_Pin | DIP-20_W7.62mm_1 | J1 |
| 1 | Conn_01x16_Pin | DIP-16_W7.62mm_1 | J2 |
| 1 | SMD0603B002TF 0ZCM0004FF2G | Fuse_0603_1608Metric | F1 |
| 1 | 1PS79SB40 | D_SOD-523 | D1 |
| 1 | A-SP192DGHC-C01-4T -5V | LED_0603_1608Metric | D2 |
| 1 | A-SP192DGHC-C01-4T +12V | LED_0603_1608Metric | D3 |
| 1 | PDZ13B,115 | D_SOD-323 | D4 |
| 1 | PESD5V0S1BAF PESD5V0S1BA | D_SOD-323 | D5 |
| 3 | BLM18PG101SN1D | L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | FB1, FB2, FB3 |
| 1 | TYA2520104R7M-10 4.7uH | L_1008_2520Metric | L1 |
| 3 | CL31A475KOHNNNE 4.7uF | C_1206_3216Metric | C1, C2, C3 |
| 2 | CL31A106KOHNNNE 10uF | C_1206_3216Metric | C4, C6 |
| 2 | CL10B104KO8NNNC 100nF | C_0603_1608Metric | C5, C7 |
| 1 | 100nF | C_0603_1608Metric | C8 |
| 2 | FRC0603F5600TS 560R | R_0603_1608Metric | R1, R6 |
| 1 | FRC0603F2003TS 200k | R_0603_1608Metric | R4 |
Show 5 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | FRC0603F4703TS 470k | R_0603_1608Metric | R7 |
| 1 | FRC0603F2202TS 22k | R_0603_1608Metric | R8 |
| 1 | FRC0603F1003TS 100k | R_0603_1608Metric | R10 |
| 1 | FRC0603F1202TS 12k | R_0603_1608Metric | R11 |
| 1 | FRC0603F8872TS 88k | R_0603_1608Metric | R12 |
4116 design files
The KiCad project lives in the tops4u/Ram-Tester repository on GitHub; these links point at the commit this page was built from.
4116: common questions
How big is the 4116 PCB?
The 4116 measures 31.8 × 37.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 4116?
32 components, from 25 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 4116 design files?
From the tops4u/Ram-Tester 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 4116 design in my own project?
Yes, under the terms of its GPL-3.0 license, which tops4u chose for the repository.
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