hello, im trying to create an ir transmitter based off a 555 timer, i have a few requirements of the circuit.
1. it must use only 1 3v coin battery
2. it must be simple and cheap as possible
here is a schematic i found as a starting point
**broken link removed**
my only issues are:
5v input, would a 555 cmos work with direct replacement?
frequency tuning, is it possible to make this without having to tune the circuit?
this is going to be in a product of mine, and i need it to be as cheap, simple, and effective as possible. long range is not an issue, the wireless gap is inside a pipe about 4 inches from where the receiver will be. all i need the circuit to do is pulse the ir diode when turned on.
if there is any other suggestions besides the 555 that would be great to know.
thanks everyone!