Some rough notes from a workshop delivered by Tinker.it
- Non-magnetic actuators used in MRI machine (piezo).
- Human reaction - we are tuned to recognise natural movement.
- Cybernetic Serendipity 1968 (ICA electronic art) Gordon pask. Later toured US & Canada at the Exploratorium.
- SAM (Sound Activated Mobile) - early senstor. Had to 'talk' to it in a steady murmur in order to atract its attention.
- Examined animals for types of movements - Lobster leg.
- Senstor looked scary when going through its test routine i.e. moving in its rigid way.
- Hydraulics very quiet as pumps can be placed remotely.
- Behaviour rather than appearance is important.
- Evoluon - spaceship event.
- Machines need maintenance.
- Senstor in Holland on blocks.
- Possibly one of the biggest computer art commissions.
- Employed by UCL.
- Recorded movements & from those movements could statistically identify if you were male or female.
- Simon penny - artists - autonomous robot.
- Ken Rinaldo - artist - dried grapevine. Cables create movement. Infrared sensors to detect movement. Sound sensors. MAchines whistle at each other. Fish in bowls move around.
- Yves Amu Klien - Octofungi.
- Driessens & Verstappen - Tickle Salon. Tassel strocks & builds a model of the person laying down.
- Paul Granjon - Low tech robots. Sexed robots. Robustly built. Big battery.
- Solenoid - Linear motion. Digital action.
- To drive 8 actuators use ULN2803 (has 8 transistors & diodes built in 500ma per channel)
- Centrifugal fan for inflating fan
- Speaker: 2 mirrors with laser.
- Floppy drive (linear motion)
- Hard drive head (make jumping robot.)
- H-Bridge - L293D
- Can make true analog output with resistor & capacitor - make an oscillator display an image.
- Servo: can get metal ones. Lots of different types.
- Edward Ihnatowicz
- Evoluon centre in Eindhoven, the home of the Senster for some years.
- The Senster by Edward Ihnatowicz
- Cybernetic Serendipity ICA exhibition in 1968
- Sound Activated Mobile (SAM) by Edward Ihnatowicz
- Wiliam Pye water sculpture
- Ken Rinaldo
- Yves Amu Klein
- Driessens and Verstappen Tickle Salon
- Paul Ganjon Sexed Robots
- Simon Penny Petit Mal
- Tim Lewis
The only maths you need to know
Voltage = Current * Resistance. (V=IR)
Power = Voltage * Current (P=VI)
Power = Current2 * Resistance (P=I2R)
Torque measured in Newton meters: (needed to spec installation).
Very useful function - Constrain number range
int rangeAdjust(float oldMinVal, float oldMaxVal, float newMinVal, float newMaxVal, float currentReading)
float ratio = (currentReading-oldMinVal)/(oldMaxVal-oldMinVal);
float newValue = ratio * (newMaxVal - newMinVal);
newValue = newValue + newMinVal; // bump up the figure into the new range
TP.org (for pump)
Power supply from Rapid. £60.
BOOK: Robotics, Mechatronics & artificial intelligence.
BOOK: Muscle wire.
Detecting position of motors:
- Could use a cam to count spins i.e. cam makes switch go on one rotation.
- Slots on a disk to count spins (optical encoder).
- Slotted opto switch (found in printers etc.).
1. List wires & measure resistance between pairs to work out which are connected.
Standard degree shift: 1.8, 7.5, 15, 30