Schematic Of Transmitter
Schematic Of Receiver
- In the transmitter schematic, no ballast resistor is shown because most small LASER power supplies already have one built in. Yours may differ, and a resistor may be needed.
- The receiver should be kept away from bright lights. You may want to put a piece of wax paper in front of Q1 to keep the LASER from swamping it.
- In order to get any decent amount of modulation, you may need to drive T1 with more then a watt.
- The circuit can be made to transmit computer data with the use of two modem chips.