This project is an attempt at designing a simple toy based on the principle of a light sensitive oscillator. It produces sound and light that vary in frequency with the intensity of light falling on it.
You can use a general-purpose PCB for this project. But it's much cleaner to use a custom PCB.
You can easily make a PCB at home using the toner transfer technique described in this link.
Using the above link as guide, print out the PCB design on photo paper on a laser printer, iron it on to the copper laminate, and once the toner sticks, etch it out with ferric chloride. You can then drill holes in the PCB using a 0.8 mm bit on a Dremel tool.
A pencil drawing on the non-copper side of the PCB will help you place the components easily. There are 2 connections that need to routed over the board manually using wires. Connect a wire between the two points labeled "A", and another wire between the two points labeled "B".
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