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Thanks for the reply and I appreciate the words of caution. As I understand, the parallel port can be used for things like this but the output isn't a steady 5v, hence the diode. Another option is to use a 9v battery as the power source and step that down too. Obviously, I don't want to blow my...
I'm wiring a simple data transfer interface which needs the voltage dropped from around 5-7v to no more than 3.7v. The schematic says I need a diode but which kind? Do they come in sizes, ratings etc?
I'm a complete novice but I hope someone here can point me in the right direction. Here it is:
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