Difference between revisions of "DI Electronics Workshop"
From Wikicliki
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* spk16000 - oscilator - crystal | * spk16000 - oscilator - crystal | ||
* push up and push down resistor - if you put it before or after the led - but it works like a kind of pipe anyway it seems, if the pipe is smaller then less will flow overall... | * push up and push down resistor - if you put it before or after the led - but it works like a kind of pipe anyway it seems, if the pipe is smaller then less will flow overall... | ||
− | [[File:arduinoexample1.png]] | + | <table><tr><td>[[File:arduinoexample1.png]]</td><td> |
+ | <pre>int yellowled = 9; | ||
+ | int myButton = 10; | ||
+ | int buttonVal = 0; | ||
+ | |||
+ | void setup(){ | ||
+ | pinMode(myButton, INPUT_PULLUP); | ||
+ | pinMode(yellowled, OUTPUT); | ||
+ | } | ||
+ | void loop(){ | ||
+ | buttonVal = digitalRead(myButton); | ||
+ | if (buttonVal == HIGH) { | ||
+ | digitalWrite(yellowled, HIGH); | ||
+ | } | ||
+ | else { | ||
+ | digitalWrite(yellowled, LOW); | ||
+ | } | ||
+ | }</pre> | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
== Thoughts/Questions == | == Thoughts/Questions == |
Revision as of 15:45, 28 October 2013
Basic Circuits
- LED - small side = long leg = positive
- Connectors - red wires positive / black wires negative or ground (why GND? GND = grounding for discharge)
- Resistor - if you didn't have it the LED would blow / it makes sure the led does not draw all of the 5v current / 220 Ohms Resistor - red red brown is 22 *10
- Resistance is calculated in ohms. So how do we figure out the current? The Lab power supply has a switch for amps/volts you can see its about 0.01.
- V=IR: See more about Ohm's Law
- Using Multimeter: solid line dc, wavy line ac, turn to 20
- Variable Resistor: aka Rotary Potentometer [use middle pin and side pin]
Arduino
- the big brick is the microcontroller
- spk16000 - oscilator - crystal
- push up and push down resistor - if you put it before or after the led - but it works like a kind of pipe anyway it seems, if the pipe is smaller then less will flow overall...
Thoughts/Questions
- IOIO is an android/bluetooth module. Why should one use that over a wifi shield with xively?
- How do I run pure data?
Trivia & other interesting things
- UK Mains has a 50Hz hum. Depending on where or what time (eg: when eastenders ends and everyone puts on the kettle) this hum will change. It is alleged that you can find out what time or location it is from the hum - mains hum signature. From wikipedia: "Electrical network frequency (ENF) analysis is a forensic technique for validating audio recordings by comparing frequency changes in background mains hum in the recording with long-term high-precision historical records of mains frequency changes from a database. In effect the mains hum signal is treated as a time-dependent digital watermark that can be used to find when the recording was created, and to help to detect any edits in the sound recording"
- IOIO: https://www.sparkfun.com/tutorials/280