The Laser Communicator Receiver
Unfortunately, this is where I have to give you the disappointing news. I’ve tried many circuit designs and have failed to find one that produces satisfactory results.
My goal in providing a receiver circuit is to avoid the necessity of Radio Shack’s Mini Audio Amplifier, Catalog #: 277-1008, because costs around $15 and you might never use it again after this. We could build an amplified receiver for much cheaper than this too, that is, if I ever find a circuit that works. I mainly focused on the Laser Torch-Based Voice Transmitter And Receiver circuit because of it’s use of a phototransistor, which is inexpensive. I would like to make one that uses either a phototransistor or a LDR (light dependent resistor) since they are both low-cost.
But for now, the mini audio amplifier will have to work. If you nave the expertise to design a great receiver circuit or know one that will work great for this, contact me and I’ll offer a reward for it if it works great.