- #1
aruna1
- 111
- 0
hey guys I'm trying to build a 38khz transmitter that works about 5m(at least) but its unsuccessful.currently I'm using this circuit. but it can't use more than 50cm. i have no idea how to increase rage.
equation is f=1/(0.8*R1*C1)
I have some NE555 and a 9V battery some transistors and couple of 0.1uf,0.01uf caps.can some one give me a circuit with higher range (at least 5m).
i know i have to give large current to IR led but i can't figure out a way to do that.
and i want some thing that will not eat 9v battery.
thanks
equation is f=1/(0.8*R1*C1)
I have some NE555 and a 9V battery some transistors and couple of 0.1uf,0.01uf caps.can some one give me a circuit with higher range (at least 5m).
i know i have to give large current to IR led but i can't figure out a way to do that.
and i want some thing that will not eat 9v battery.
thanks