DeViCeS oF pErCePtIoN
Day 1 Notes
Learning about the two versions of circuits you can make with the 55 timer, for two modes, Astable and Monostable.
The Astable mode the circuit has a constant output which's the duration can be varied by using resistors and capacitors with different strengths. In this example we used an LED as the output.
The 555 TIMER: ASTABLE MODE
-insert video-
Then you've got to 'get inside the machine' The internal Logic of the 555 Timer.
Day 2 Notes
'Technology is an agent of power... and in practice is not the sum of the artefacts, but a system much more than the parts. this system includes organisation-mindset-symbols and a whole body of knowledge...' - Sonia Sheridan Bonds
The 555 TIMER: MONOSTABLE MODE
The Monostable mode includes a stitch, which when activated, lets the circuit run for a duration of time that is conditioned by the resistors and capacitors. (on once, HIGH)
Switches:
H-Bridge for controlling the direction of a motor:
File:Day2 F.jpg
Using a relay:
1st Assignment:
Two choices: Make a switch (super conceptual) using the 555 timer in MONOSTABLE mode. Output what ever you like. Focus is on the switch.
Or
Make a variable resistor (alternative, creative) the main thing is that what ever it is, the material needs to be conductive. Using the 555 timer in Astable STABLE mode. Output will be sound (speaker) Focus is on the aesthetic of the sound and the creative use of resistance.
So! to thinking and sketching.....
Working with Luis, we came up with an electric anti-bird cage. The wind should blow the switched to turn on the LED's, which in turn are recognised by the photocells, acting as resistors in another circuit which produces sounds. We tried it in the Ilm Park at night.
Here is a video of it inside: https://vimeo.com/98824110
This is the Cage in the ilm Park:
https://www.youtube.com/watch?v=5zqEh81ad68&feature=youtu.be
This is a 3d circuit diagram of both circuits:
