Saturday, June 18, 2011

Heart beat circuit


Since I can't do much with the micro-controller until the oscilloscope arrives, decided to change my attention to something else. In this case, I am working with the heart beat special effect.

This effect will be part of the chest portion of the outfit. Part of it will be a dull red throbbing heart beat. Aside from that it will include some faking pumping visible blood in glass cylinders.

The basic circuit is done for the heart beat lights. Although I am using LEDs, they will be masked in such a way as to not be directly visible. A picture of the circuit is shown below. It is on a breadboard so not permanently mounted yet.



In the picture you see two chips. The top chip is a 555 timer control chip. This chip allows for a pulse to be generated on a regular basis. Think of it as someone taping there foot to keep a beat. The resistors and capacitors attached to it control the rate of the beat.

The bottom chip is a 4017 decade counter. That fancy speak for a chip that essentially just counts from 0 to 9 over and over. The 555 timer chip tells the 4017 chip how fast to count. I hooked up some LEDs so that they would light up when the chip hit number 0 and number 3. Giving it a double beat, pause, double beat, pause. Pretty basic but I think the effect will work.

2 comments:

  1. dear bomlin,can i get full report of this project..i really looking forward to do this project..if u dont mind would u sent me through email about this details..

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    1. Hi there. Truth be told, work became very busy and I haven't done much in about 6 months. Just recently I started getting back into the project creating a production version of the automated mandible seen in the last video I posted.

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