Competition for radio amateurs - 7400 contest 2012

It's time to uncover the soldering iron! The competition of development on logic chips of the 7400-series began again (as well as 4000 CMOS and Soviet analogs - K155 and their ilk). The deadline for accepting works is October 31, 2012 .

The point is very simple - you need to invent and implement anything in the gland on logical chips: you can go on the breadboard, you can on the printed circuit board, you can use a bunch of wires - whatever you like. You can not only take the simulator work. A whole bunch of prizes, so it will be difficult to leave empty-handed.

Judging criteria are as follows:

• Hilarity ("noisy wild fun")
• Originality
• Quality of documentation
• Unorthodox use of chips (for example, as an AM transmitter)
• Technical ingenuity
• Build quality
• Imagination and creativity

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What to do?

There are no restrictions, but the more original and unexpected - the higher the result will be. It is not necessary to do something on hundreds of chips, you can win on very simple, but original schemes.

Here, for example, the winners of last year:

1: 7400 Capacitive Touch Array
2: 7400-based Capacitance Meter
3:

• Telephone Intercom From TTL
• 7400 Based Full Wave Rectifier
• Lazarus 64 (Retro game system, graphics gen)
• Masochist's Video Card
• Lights Out, Turing Style
• Illogical Dickson Doubler
• 74Clock
• 7400 Series Drum Machine (Four-channel, sixteen-step percussion synthesizer / sequencer)
• Electronic Realization Etch-A-Sketch Toy with 32-Page Flip-Pad

four:

• Nixie Tube Clock
• Pure TTL Clock (5 digit 7 seg display)
• Discrete servo driver
• Discrete logic POV Clock
• Animated LED Christmas sign
• SPI LCD Backpack
• TTL Tilt Sensor
• 7400 Logic E-reader
• Discrete logic amplifier
• Police Lights and Siren (shown for Toy Car)
• AM Radio
• TTL based range finder (with 3 digit 7 seg display)
• Accelerometer Controlled Racing Game
• TEC Temperature Controller (Peltier)
• CD4007-Based Voice Changer
• Game of Life with CMOS logic
• 7400 Drum Machine
• Homemade 7400, better than Logical 7400
• Horologium Romanum (Roman Numeral Clock)
• Bin night reminder
• 80M Direct Conversion Receiver
• 7400 Series Logic PLL Based Switch-Mode PSU

Your work should be published on any website, and send a link to the jury through this form .

Good luck! (And do not forget about the decoupling of food , especially on the brainboard - save debugging hours)