1 |
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Berg Connector
molex to berg connector adaptor to power the board.
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2 |
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Molex 3 Pin Headers
For the fans to plug onto.
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1 |
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4x2 Row Header Pins
For the Berg Connector to clip onto
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2 |
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NPN Transistors (I used PN2222ATA)
Used to switch the 12V supply to the fans. Alternatively I'm certain two FETs could be used instead.
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5 |
× |
100nF Ceramic Capacitors (aka 0.1uF)
For filtering the encoder bounces and decoupling the avr power supply.
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1 |
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5.1V Zener Protection Diode
To help protect the avr and clamp the voltage to 5.1 V should it spike.
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2 |
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Power Diodes (I used two 1N5817RLG)s
To protect the fans from back EMF
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5 |
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10K Ohm resistors
Pull up for RESET pin on AVR, other part of filters used for encoders.
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2 |
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1k Ohm resistors
For the output of the PWM pins to the base of the corresponding transistors.
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2 |
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Rotary encoders (I used Bourns PEC11-4215K-S0024)
For altering our PWM output - also note this model is now obsolete and will soon be replaced by the PEC11R I believe.
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1 |
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ATMEL AVR ATtiny2313
The brains of this wee getup.
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1 |
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Prototyping board/stripboard/Perf Board
Or design your own PCB from the schematic ;)
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1 |
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Atmel Programmer
(I used a JTAG ICE3 but any kind of ISP programmer will do nicely.)
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