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Raspberry Pi For Dummies by Mike Cook, Sean McManus

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Building the Raspberry Ripple

What you are going to make next is the Raspberry Ripple, an analog input/output board. In electronics, the word ripple is used to denote small, often rapid, changes in a voltage. This board is going to look at changing voltages, hence the name. After you’ve made it, you can make a whole range of projects with analog signals. We show you some examples at the end of the chapter.

Here are the parts you’ll need to build the Raspberry Ripple:

check.png 1 2.8"×1.7" copper strip prototype board.

check.png 1 16-way DIL IC socket.

check.png 1 PCF8591P 8-bit A/D and D/A converter.

check.png 1 2N2222 NPN transistor.

check.png 1 1N4001 diode (or any other diode).

check.png 2 47uF capacitor 6V8 or greater working voltage.

check.png 1 1K wire-ended resistors.

5 3-way PCB mounting terminal block with screw connectors.

Note the Phoenix contact–PT1,5/6-5.0-V–terminal ...

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