Chris from PyroElectro writes: Here’s a little project I thought you guys might like….I re-built the Masochist’s Video Card using the DE0 Nano FPGA board that I won in the 7400 logic competition. The project article has all the details … Read more
Here is a comprehensive review of the ProtoStack ATmega328 kit that Eric won in the 7400 contest. He was pleasantly surprised that Protostack included an USBasp AVR programer. The review goes into detail on how to build a Arduino clone … Read more
Thank you participating in the Open 7400 Competition. All the entries were amazing, check out the full list here. Four judges, Dave Jones from EEV Blog, Jayson Tautic CEO of TAUTIC ELECTRONICS LLC, Marc Alexander from Freetronics, and Dino Segovis from … Read more
The open 7400 logic competition is a collaborative, crowd sourced, open source competition. We started with a few prizes, but we crowd sourced our way to 20 sponsors and $1000s of dollars of swag. Judging guidelines, categories, and artwork were … Read more
Here’s a (hopefully) complete list of entries in the Open 7400 Competition. Please share your favorites in the comments below, your favorites will receive a special reader’s choice prize. Voting ends in 24 hours. A few commenters will receive free … Read more
Gagandeep built a “bad driver” feedback display. It’s a huge 40X16 LED matrix spanning ~80cm in width, and it’s designed to be placed on the rear windshield of a car. The spacing of 2cm between LEDs is enough to ensure … Read more
Jonathan entered a Flickering Jack-o’-lantern for the Open 7400 Logic Competition. He recorded a video of his project, which is available below. I used a 74HC14 to create four different square waves of different non-harmonic frequencies that were mixed together … Read more
Embeddederic entered a 7400 series logic PLL-based switch-mode power supply into the Open 7400 Logic Competition. Via the forum.
Jason added another entry to the Open 7400 Logic Competition: 80M direct conversion receiver I had fun using the 74HCU04 to make a little TRF AM radio, but my original goal was to build a direct conversion receiver. I didn’t think … Read more
Andrey entered a Game of Life build from CMOS logic into the Open 7400 Logic Competition: This was supposed to be my entry for Open 7400 logic competition. It’s Conway Game of Life on 8×8 LED dot matrix, made with … Read more
Arup entered his Homemade 7400 into the Open 7400 Logic Competition. A video of it proving his concept is available below. At an earlier post I’ve said that I didn’t have 7400ICs in my drawer. Surprisingly, the local store was … Read more
Shaos entered a (balanced) ternary electronic device based on the 74HC4052 into the Open 7400 Logic Competition. Ternary Balanced ternary is a base-3 number system, instead of bits (0, 1, 10, 11, etc), this counts in trits (-1, 0, 1): … Read more
Kevin entered a Detailed consumer IR capture with 74HCxx series chips for the Open 7400 Logic Competition: This is a CIR (Consumer IR / Remote Control) capture device built with 74HCxx series logic chips. It allows a computer to do … Read more
Helmy entered an 8-Channel 6MS/s USB logic analyzer into the Open 7400 Logic Competition. His device converts the 8 channel parallel inputs into a UART based serial signal. It outputs this serial signal to the input pin of a PL2303 … Read more
Matt built a fully featured Drum machine for the Open 7400 Logic Competition. Check out the video of its operation and his sound generating skills below. This is a four-channel, sixteen-step percussion synthesizer/sequencer created entirely from discrete logic chips (mostly … Read more
Joe entered his Horologium Romanum into the Open 7400 Logic Competition. It is a clock that displays it’s time in Roman numerals built from logic ICs. There is a video of it below. Despite the Roman Empire’s sanitation, medicine, education, … Read more
Luc entered his Wheely bin night reminder into the Open 7400 Logic Competition: Because the competition was so open ended in its brief, I placed two constraints on myself: First, I had to make do with the logic chips (and … Read more
After being discouraged by a failed order for their initial entry, Ben and his girlfriend decided to enter a somewhat different design into the Open 7400 Logic Competition. It consists of taking their anger out on 7400 chip. By pumping … Read more
Daniel entered an Electronic realization of Etch-A-Sketch toy into the Open 7400 Logic Competition: This project is an electronic realization of the famous Ohio Arts “Etch-A-Sketch” toy, with a twist. Like the original, two rotary knobs are used to move … Read more
Christopher created a Drum Machine for the Open 7400 Logic Competition. He also documented it in a video below. The idea for building a drum machine came from a discussion I had with my roommates in which we were talking … Read more
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