

NullCIC
A little board to replace the CIC on the original NES or OpenTendo.
- Size
- 10.8 × 21.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 4
- Nets
- 17
- Pads
- 25
- Tracks, vias
- 24, 0
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 6 Mar 2020
- Updated
- 10 Aug 2020
Overview
NullCIC is an open-source printed circuit board by Redherring32, from the Redherring32/NullCIC repository on GitHub. It is a 2-layer board of 10.8 × 21.8 mm with 4 parts on 17 nets, routed with 24 tracks and 0 vias.
It is built around the 74LVC1GU04DRL. Its parts include 1 capacitor, 1 resistor and 1 IC.
Main components
1README
README.mdNullCIC
A little board to replace the CIC on the original NES or OpenTendo, and restore reset functionality.
All the files needed to make your own are located under the releases section.
You can also do the same thing the NullCIC does manually, just check "Reset fix without NullCIC.jpg"

Licensed under the TAPR Open Hardware License (www.tapr.org/OHL)
©Redherring32 2019-2020
Parts
4| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 0.47uF | Capacitor_SMD:CP_Elec_4x5.3 | C1 |
| 1 | 0R | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 10NES_CIC | Package_DIP:DIP-16_W7.62mm | |
| 1 | 74LVC1GU04DRL | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U2 |
Questions
How big is the NullCIC PCB?
It measures 10.8 × 21.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the NullCIC use?
4 parts, built around the 74LVC1GU04DRL. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the NullCIC KiCad files?
From the Redherring32/NullCIC repository on GitHub, at the commit this page was made from: the board is Board Files/NullCIC.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the NullCIC design in my own project?
Its repository states no licence, so its author keeps all rights: ask Redherring32 before reusing the design.
Similar boards
- 4 layers233.4 × 100 mm

- 2 layers88.9 × 71.8 mm

Adapter
doitaljosh/gea-interface-board
KiCAD board files for making an interface board that converts the RJ45 diagnostic port on most newer GE appliances to usable UART. Note: these are untested designs.
44 parts10 - 4 layers100 × 70 mm

- 2 layers114.2 × 36.8 mm

Airbox
Alacrity-Education/AirBoxV2
The AirBox V2 Station is an open source air quality monitoring station based on the Sensirion SEN66 sensor. It measures particulate matter, CO2, VOC and NOx, runs on a solar charged lithium cell, and reports over Wi-Fi.
68 parts6GPL-3.0 - 2 layers100 × 50 mm

- 4 layers191 × 229 mm

- 2 layers72.4 × 48.3 mm

- 6 layers120 × 50 mm

Usb switch
cubicap/usb4-thing
An attemt at creating a USB4 multiplexer controlled by ESP32-S3.
65 parts