making of LED device part 2

Tried at least 6 old 3.5mm audio jacks finally get one which works

later i figure out that they wont work because i didn't solder them together.

actually i blink with the music i am playing!

Then start serious soldering (This is the first time soldering ever in my life)

not bad right?

After hours of trying the device finally works

Nice effect in complete darkness

The magic chip

Tip31c received

晶体管型号： TIP31C
制作材料： Si-NPN
性质： 低频或音频放大 （LF），功率放大 （L）
封装形式： 直插TO-220封装

datasheet: http://www.datasheetcatalog.org/datasheet2/0/00yr77xx8x32ksz116j6f4f6a07y.pdf

making of LED device part 1

Trying to connect 3.5mm audio jack with Tip31

start blowing LEDsss cause of wrong resistors

Finally get the LEDs lit without burning them but still not working with Tip31

Things brought

to fininsh the circuit i need lots of tools

tool needed:
1. solder
2. soldering iron
3. wires
4. Tip31a or c
5. place mat
6. resistor
7. 12v input (i am thinking of 12V battery case)

so i go to shum shui po and Taobao for them

The LED circuit i made

This is a circuit that need a input of 12v , 4 leds, wires, a chip TIP31a and a audio jack.

this circuit allow the LEDs blink with the audio input

simple ways to lit led

LED throwie

A simple led cube

DIY LED Reef Aquarium Light


but these only lite the leds up and not interactive

led circuit research

http://www.qsl.net/yo5ofh/hobby%20circuits/led_circuits.htm
http://en.wikipedia.org/wiki/LED_circuit
some easiest circuits

some complicated ones