http://www.pyroelectro.com PyroElectro.com brings you cool projects & tutorials that you can do at home. Mon, 06 Feb 2012 18:15:06 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://www.pyroelectro.com/2011/10/20/ttl-logic-beeping-down-counter/ http://www.pyroelectro.com/2011/10/20/ttl-logic-beeping-down-counter/#comments Thu, 20 Oct 2011 18:45:02 +0000 Chris http://www.pyroelectro.com/?p=3126

My crazy 7400 logic circuits continue with this week's parody of a movie prop from Iron Man 2. The circuit built in this project is a beeping down counter and since I didn't see this classic circuit entered into the 7400contest, I figured there's time left for one last entry. Just like in Iron Man 2 there's a little red button to start the countdown, a dual 7 segment led display and a nice 'beep' for each count.

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]]> http://www.pyroelectro.com/2011/10/20/ttl-logic-beeping-down-counter/feed/ 0 http://www.pyroelectro.com/2011/10/14/ttl-tilt-sensor-via-accelerometer/ http://www.pyroelectro.com/2011/10/14/ttl-tilt-sensor-via-accelerometer/#comments Fri, 14 Oct 2011 18:00:48 +0000 Chris http://www.pyroelectro.com/?p=3013

Time for more accelerometer stuff! Since the 7400 logic competition is allowing more than one entry, I figured why not build something else? This tilt sensor was designed using only 7400 TTL discrete logic parts, so there is no software involved. It uses an accelerometer sensor's output for X and Y axis to show you how much the board is tilted on an 8x8 LED matrix display.

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]]> http://www.pyroelectro.com/2011/10/14/ttl-tilt-sensor-via-accelerometer/feed/ 0 http://www.pyroelectro.com/2011/10/06/vga-interface-using-only-74xx-ics/ http://www.pyroelectro.com/2011/10/06/vga-interface-using-only-74xx-ics/#comments Thu, 06 Oct 2011 19:30:04 +0000 Chris http://www.pyroelectro.com/?p=2967

To go with my other vga oriented projects here's a VGA interface that is built entirely with TTL discrete logic chips. I built it primarily for the 7400 contest over at dangerous prototypes, so give a comment over there if you like the design.
This interface outputs the proper Hsync and Vsync signals using some 74193 counters and uses an 8-state machine to output different color signals to an LCD.

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]]> http://www.pyroelectro.com/2011/10/06/vga-interface-using-only-74xx-ics/feed/ 0 http://www.pyroelectro.com/2011/07/07/mini-ir-theremin/ http://www.pyroelectro.com/2011/07/07/mini-ir-theremin/#comments Thu, 07 Jul 2011 18:00:15 +0000 Chris http://www.pyroelectro.com/?p=2158

If you're a music lover, this Pyro Electro project is for you. Today I show you how to build your own IR Theremin. This style of theremin uses an infrared proximity sensor, a headphone speaker and a PIC micro to create an off-the-shelf style of instrument. The article includes demo vids of me playing simple songs on the theremin.


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]]> http://www.pyroelectro.com/2011/07/07/mini-ir-theremin/feed/ 2 http://www.pyroelectro.com/2011/04/14/pyro-propeller-clock-pov/ http://www.pyroelectro.com/2011/04/14/pyro-propeller-clock-pov/#comments Thu, 14 Apr 2011 18:00:55 +0000 Chris http://www.pyroelectro.com/?p=1664

Today's PyroElectro Project: A Propeller Clock! These things are all over the place on the web and on youtube, but few bother to explain how they are built. This project goes from start to finish explaining how to build a simple POV that can display virtually whatever you want.


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]]> http://www.pyroelectro.com/2011/04/14/pyro-propeller-clock-pov/feed/ 2 http://www.pyroelectro.com/2011/03/31/the-tupperware-turret-airsoft/ http://www.pyroelectro.com/2011/03/31/the-tupperware-turret-airsoft/#comments Thu, 31 Mar 2011 18:00:35 +0000 Chris http://www.pyroelectro.com/?p=1599

Today's PyroElectro Project:
The Tupperware Turret is a highly modified airsoft pistol put onto a pan and tilt platform with a turret cover. It rotates, tilts up and down and has precise fire control. Control is done wirelessly with a generic TV remote control.


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]]> http://www.pyroelectro.com/2011/03/31/the-tupperware-turret-airsoft/feed/ 4 http://www.pyroelectro.com/2011/03/17/build-a-mini-av-test-box/ http://www.pyroelectro.com/2011/03/17/build-a-mini-av-test-box/#comments Thu, 17 Mar 2011 19:00:53 +0000 Chris http://www.pyroelectro.com/?p=1531

This week's PyroElectro project is a small mint-box sized audio/video test box for testing audio and video output in an easy way. The VGA signal output is simply 3 blocks of Red, Green and Blue. The audio output is a single tone that can be changed with a trimpot/knob.


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]]> http://www.pyroelectro.com/2011/03/17/build-a-mini-av-test-box/feed/ 1 http://www.pyroelectro.com/2011/03/03/mint-box-fm-bug-transmitter/ http://www.pyroelectro.com/2011/03/03/mint-box-fm-bug-transmitter/#comments Thu, 03 Mar 2011 20:00:50 +0000 Chris http://www.pyroelectro.com/?p=1461

Today's PyroElectro Project takes you through the process of building an FM bug inside of a small mint box! It only takes 17 electrical parts to build the bug, but you also need a lot of patience and perseverance. If you want to get started in wireless electronics, don't miss this project!



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]]> http://www.pyroelectro.com/2011/03/03/mint-box-fm-bug-transmitter/feed/ 1 http://www.pyroelectro.com/2010/12/14/the-sharpie-dotifier/ http://www.pyroelectro.com/2010/12/14/the-sharpie-dotifier/#comments Tue, 14 Dec 2010 20:00:25 +0000 Chris http://www.pyroelectro.com/?p=1100

This project uses a robotic arm made of servos, builds a platform stage and stepper motor to move it and draws whatever you input to it. A laptop reads from a picture file and sends commands to the arm telling it what to draw and where.


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]]> http://www.pyroelectro.com/2010/12/14/the-sharpie-dotifier/feed/ 1 http://www.pyroelectro.com/2010/09/16/line-following-mini-tank/ http://www.pyroelectro.com/2010/09/16/line-following-mini-tank/#comments Thu, 16 Sep 2010 19:00:08 +0000 Chris http://www.pyroelectro.com/?p=807

In this new project from the Pyro, I bring you back to the basics and guide you in making a line follower mini tank! Using an IR emitter LED and a photo-transistor the mini tank can 'see' the difference between white and black and follow a black line.


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