Monday, October 5, 2009

Moving onward...


Went on a trip back in time so to speak here, going back to basic elctronics, which I unfortunately hadn't only briefly touched on since my JC back in '02. However, I found the stuff relatively easy to manage and understand. Rough notes taken are below.

  • electricity - voltage and current
  • for a given voltage the resistance of the circuit will set the current
  • large resistance will restrict the current more than a small resistance
  • Ohms Law: I = V/R
Resistors in series: Rt = R1 + R2

Resistors in parallel: 1/Rt = 1/R1 + 1/R2

Examples of equations and diagrams:
  • 2 resistors each of 1kOhm are connected in series with an SV battery across them:
  • current is the same everywhere as there is only one path
  • Potential Divider - useful for simple sensor circuits
  • Arduino - open-source physical computing platform based on a simple i/o board
  • based around a programmable microcontroller (Atmega168)
  • i/o = input/output
  • digital + analog (+ serial)
  • IDE = integrated development environment
  • Firmware is software that is embedded in a hardware device such as a microcontroller
  1. Write our firmware
  2. Compile
  3. Debug
  4. Compile
  5. Debug
  6. Compile
  7. Upload to arduino
  • solenoid is an electronic switch

HIGH = 5v
LOW = 0v

Anode +
Cathode -

We later looked at some makezine tutorials on youtube (

In this lectue we were introduced to the idea of critiquing performances. We started off with a performance by Michael Waiswisz, with his NIME called the Hands. If was too sort of paddle like glove devices with buttons and sensors. It also has a microphone for him to input the original sounds before he altered and played them using the device. He seemed a bit crazy to say the least, but he definitely knew what he was doing, and I liked it, (despite my usual distaste for all things more noisy than straight-up musical).

Watch the video here:


Today we just continued on the arduino stuff, so just some diagrams and simple notes to be shared today.

  • Arduino Pin 13 has a built in resistor

  • Resistors used like in the diagram to the above right are called pull down resistors

No comments:

Post a Comment