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The Ben Heck Show Episodes


Here is my first project using Raspberry Pi.

Electric Chair prop


It's an animatronic Halloween Electric Chair Prop using Raspberry PI GPIO.


watch him in action on youtube




P and Relays


The PI and software:  (what I learned to do with the PI on this project)

- written in Python using IDE

- opens and plays an MP3 file

- configures GPIO

- opens a .csv text file with ones and zeros and outputs to the GPIO port at a regular interval (every 33 msec)

- reads an input on the GPIO to trigger the prop

- auto executes the program at bootup


The sequence is 1 minute long

- waits for the switch to ground an input pin

- hits a relay to turn on a flood light and a turn on a yellow beacon light on top of the electric panel

- the side lights flash in sequence with a buzzer warning sound for 10 seconds

- the electric noise starts and he starts to shake (there's a hedge shaker toy in his head)

- he starts to scream and pneumatics start jolting him forward

- the electric noise gets louder and he jerks forward and back more violently

- the strobe light starts flashing in the electric panel

- the sequence ends as a fog machine pipes fog through his head


pictures of the PI, a relay board, and a pneumatic solenoid switch