How to build a simple but cool IR (Infra Red) receiver.
Part listThis is the part list with pictures and description. Depending on where you live, the IR receiver and a honestly priced serial shell are sometimes hard to find.
[-] Sub-D 9-pin serial box; very standard component, avoid the metallized ones if you can:
[-] Sub-D 9-pin female connector:
[-] TSOP 1738 IR receiver: many other IR rceivers are avaiable on the market, althought not always easy to find. Check lirc receivers page for a full list; keep in mind that, according to the data sheets, this component is one of the best for its receiving angle. I've also tested it 30 meters far away!
[-] 4.7μF electrolitic capacitor: electrolic capacitors are polarized, so you have to connect the correct lead to ground; there are some non-polarized capacitors on the market and as long as they have 4.7μF capacitance they will be just fine, perhaps only a bit more expensive.
[-] 5V 100mA TO-92 78L05 voltage regulator: You must check the data sheet of your own voltage regulator to be sure the in and out pins are in the same position of the one I've used.
[-] 4.7kOhm resistor: if you can buy a reduced power (and size) of the resistor, it will be easier to fit inside the serial connector.
[-] 1N4148 universal diode:
[-] Little piece of wire:
[-] (Optional) Thermal tube (available in most electronics shops):