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Archive for the ‘7400 contest’ Category

7400 competition entry: CD4000 digital alarm clock

Saturday, November 3rd, 2012

Jvok's open 7400 Logic Competition entry is the CD4000 digital alarm clock. As the name suggests this is an alarm clock based on CMOS 4000 series logic ICs. I designed this clock over the course of two weeks for the Open 7400 Competition. The clock, which is made from 25 CD4000...

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7400 competition entry: The BrainF**k machine

Saturday, November 3rd, 2012

Here's another 7400 entry, BrainF**k machine. This is a home brew 8bit CPU with 8 instructions, supporting the BrainF**k esoteric programing language. It is possible to design a relatively powerful processor with a very small amount of logic circuitry, provided that the architecture and the instructions are carefully built for...

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Posted in 7400 contest, contest | 5 Comments »

7400 competition entry: 7400 Dimmer

Friday, November 2nd, 2012

[embed]http://www.youtube.com/watch?v=NIdGid3Dgq0#![/embed] Control your lights via a 7400 based dimmer. This is RodLophus' entry for the open 7400 Logic Competition: The idea is: For a typical dimmer, when you apply a pulse on the gate terminal of the TRIAC, it turns on - and stays on until the mains voltage crosses...

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Posted in 7400 contest, contest | 3 Comments »

7400 competition entry: Mr. @#?%!…A 74xx based Q*Bert-ese obscenity generator

Friday, November 2nd, 2012

[embed]http://www.youtube.com/watch?feature=player_embedded&v=uNsKIgTNvM8[/embed] Here's David's 7400 entry, the Mr. @#?%!...A 74xx based Q*Bert-ese obscenity generator: In honor of the 30th anniversary of Q*Bert's release in arcades, I present "Mr. @#?%!"... A 74xx-based Q*Bert-ese Obscenity Generator, built exclusively using parts available in 1982. Build something that uses or abuses a logic chip and...

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7400 competition entry: CMOS frequency counter

Friday, November 2nd, 2012

Miguel sent in his entry to the open 7400 competition. It's a CMOS frequency counter based around the CMOS 4000 series logic chips. It's capable of counting for 1 Hz up to 1 MHz. The project consists of a frequency counter that uses only old-school CMOS chips: 4511 display drivers,...

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7400 competition entry: World’s most useless machine

Friday, November 2nd, 2012

[embed]http://www.youtube.com/watch?v=TG-n48N22r4[/embed] Check out Alex's useless machine with a chain switch. It's operated with 4 servos and uses 11 7400 logic chops. It's his entry to the Open 7400 Logic Competition: This is a last minute (and very useless) entry. I wanted to make something that shut itself off, but I...

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7400 competition entry: DIY musical keyboard

Friday, November 2nd, 2012

Oakkar7 shows you how to make an awesome DIY musical keyboard using only 7400 logic. The idea is to design and construct an electronic musical keyboard with some functions, effects etc,. This is my old school project and I remake and modified it. It is fun. Build something that uses or abuses a logic chip...

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Posted in 7400 contest, contest | 6 Comments »

7400 competition entry: Lineclock

Friday, November 2nd, 2012

This open 7400 competition entry is a clock which displays it's time as text on 32 5x7 dot matrix displays. The display itself is driven via a board that was scavenged from an East-German numerical control unit. I build this clock with an old display-board from an east-german numeric control....

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7400 competition entry: Bug shaped robot

Friday, November 2nd, 2012

Here's a bug shaped robot entered into the open 7400 competition. Power by a solar panel, this 7400 logic based robot moves toward the life giving light source. Powered by a solar panel, this miniature robot shuffles towards the light.  This project was a venture into BEAM robotics, a now...

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7400 competition entry: Quiz Show Buzzer

Friday, November 2nd, 2012

[embed]http://www.youtube.com/watch?v=dLLAbiFAkfo[/embed] Need a quiz show buzzer system? Check this out! A Quiz Show Buzzer was just built only with 74XX series device. A single 74LS373 Octal D-Type Flip Flop was used instead of several AND gates. Eight DATA INPUTs serve as quizzer’s user interface and the eight DATA OUTPUTs were...

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Posted in 7400 contest, contest | 6 Comments »

7400 competition entry: A game of Tic Tac Toe with logic IC’s

Thursday, November 1st, 2012

[embed]http://www.youtube.com/watch?v=LSIJgAMQTiI[/embed] Do you like to play games? Try this Jayahari's fun Tic Tac Toe game: First of all thanks to DangerousPrototypes! its because of you guys I worked on logic gates after college – else its usually the usual microelectronic stuff! :) This build is a simple ‘Tic Tac Toe’ game....

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Posted in 7400 contest, contest | 3 Comments »

7400 competition entry: Fourbit, 4-bit homebrew CPU

Thursday, November 1st, 2012

Here's another Open 7400 competition entry a 4-bit homebrew CPU designed by Jaromir: Since I was born in mid eighties, I've never experienced real 74xx build. Few gates here and there was common, but lager designs were practicaly uneeded - as microcontrollers, CPLDs or FPGAs replaced need for such as...

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7400 competition entry: 1 bit microcontroller

Wednesday, October 31st, 2012

Check out Giuseppe's Open 7400 competition entry. It's a 1 bit microprocessor based on the MC14500 CMOS chip. This circuit is based on the CMOS chip MC14500. This chip is an ICU (industrial control unit) built from Motorola few years ago, it is a 1 bit processor that can do some...

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Posted in 7400 contest, contest | 4 Comments »

7400 competition entry: 7400 Logic Based Calculator

Tuesday, October 30th, 2012

7400 Logic Based Calculator is the open 7400 competition entry by students of the Pakistani Institute of Industrial Electronics Engineering. This was an assignment during their 6th semester course Digital Electronics II. Digital logic based calculator built on 7400 series ICs which can add and subtract two digits with clear, and...

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Posted in 7400 contest, contest | 23 Comments »

Want us to extend the open 7400 competition deadline by a week?

Tuesday, October 30th, 2012

We've been getting requests from you to extend the deadline of the open 7400 competition. We're considering pushing the entry deadline by a week. If this is helpful to you, post about it in the comments. The official deadline is tomorrow, October 31st. Build something that uses or abuses a...

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Posted in 7400 contest | 34 Comments »

7400 Competition Reminder: Only 2 days left to enter your design

Tuesday, October 30th, 2012

Just a reminder to all potential entries that the deadline is October 31st. You now have only 2 days to submit your entry. Good luck! Build something that uses or abuses a logic chip and get amazing boards, tools, and other swag. The Open 7400 Logic Competition promotes awareness of...

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7400 competition entry: 7400 ping))) pong

Monday, October 29th, 2012

Alex entered his 7400 ping))) pong video game into the 7400 Logic Competition. It's a clone of the old TV console classic, but implemented with 7400 logic and 556 timers (twin 555s). The project took a total of thirty 7400 chips and 556 timers. There is no microcontroller, just discrete logic....

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7400 Competition Reminder: 5 days remains until the entry deadline

Saturday, October 27th, 2012

Just a reminder to all potential entries that the deadline is October 31st. You now have only 5 days to submit your entry. Good luck! Build something that uses or abuses a logic chip and get amazing boards, tools, and other swag. The Open 7400 Logic Competition promotes awareness of...

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7400 competition entry: Mathemagic – Mind Reader

Friday, October 26th, 2012

[embed]http://www.youtube.com/watch?v=8WPEhn52rb8[/embed] Mathemagic, mind reader or a decoder, you decide. This open 7400 competition entry bases it's magical properties in a mathematical game of coding and decoding numbers in binary sequences. The concept behind this is a BCD to 7-Segment decoder(IC7447). The unit and tens place of the number are in...

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Posted in 7400 contest, contest | 1 Comment »

7400 competition entry: Direct digital synthesis arbitrary waveform generator

Thursday, October 25th, 2012

Arbitrary waveform generator  designed by NiHaoMike is a Open 7400 competition entry. It uses a serial link with a computer to load up a W24512A SRAM IC which is then clocked out into a TLC7524 digital to analog converter. This is really just for fun - it doesn't make a...

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