Re: Need help on very basic stuff

Thank you, Chris and Rich. I noticed that even though I had some
classes on the topic back in College, I didn't retain the slightest bit
of practical knowledge about the topic. Therefore, you can imagine how
thrilled I was when my visible LED would actually turn on and off when
I put my finger through the beam.

Since I actually AM in a hurry, (and I like experimenting better than
reading), please let me know what you all think about this circuit,
generously published by David Cook:
http://www.robotroom.com/Infrared555.html

If I can make my Voltage lower to +5V DC steady, (with an LM7805),
can't I just build above circuit and voila? Or what major problems
would I face?

And on the other end, I use the (276-640) 38kHz IR Receiver Module from
Radio Shack, possibly in combination with another LM7805 for voltage
regulation and maybe a transistor (as switch) for supplying the result
to the rs232 pin? Or can I use the power of the rs232 directly? I
remember having seen circuits on the topic, but I think there is some
danger involved.

The electronics kit sounds like a good idea, but on the other hand, you
know how many parts I can burn out for 50 bucks? :-)

Thank you all again for your help. I'll keep you posted about my
progress, if that's ok...
Manoo.

.

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