I can just imagine how conductive paint would improve a project like this, my latest creation is a signal generator, and instead of running wires I could paint the wires on the plastic.
This project is a green project because of the salvaged circuits and the reuse of candy boxes.
Step 1: The Candy Boxes
My wife thinks I am a romantic giving her chocolates all the time, now she knows I want the boxes but she still likes getting the Bon Bon’s. I open one of these boxes of Bon Bon’s and before I can say Bon Bon’s their gone between my wife and sons, I am lucky to get one.
Step 2: The Signal Generator
It has two independent outputs, one for sine wave and the other for square wave. The circuit can produce frequencies from approximately 40Hz to 2.5KHz or from 2.5KHz to 10KHz depending on the position of the range select switch. The sine level can be adjusted from 0 to 2V peak-to-peak through a trimmer potentiometer. The square wave output provides two separate fixed level outputs, one at 5V and the other at 9V.
Step 3: Modifications to the Circuit
Step 4: Selecting the Box
6 x 2 ½ x 2 ¾ inch sharp edged
5 ½ x 3 x 2 ¾ inch diamond edged
5 ½ x 3 x 2 ¾ inch round edges
6 ⅜ x 4 ⅜ x 1 ½ inch sharp edged diamond patterned
I have a number of projects to mount in boxes and for the Signal Generator I needed a box large enough to house the circuit with room to accommodate lining up the pots for making the holes.
It had to house the battery and needed room on one side for the two switches and two pots. I would have preferred a box that had room for the outputs also but I can put the outputs on the top of the box.
The box I selected was the 5 ½ x 3 x 2 ¾ inch round edged.
Step 5: Mounting the Circuit
Mark the front of the box where the pots will go.
I used a soldering Iron to make the holes for the pots then I removed the front two mounting spacers and bolt the circuit to the front of the box by the pots.
On the bottom of the box I used the soldering iron to make the holes for the back mounting spacers and screwed them to the box.
Last I made the holes for the switches and mounted them to the front of the box.
Step 6: Mounting Feet on the Box
You can buy stick on feet or you can make feet and glue them on the box, just as I did in this Instructable I made feet from cork and glued them to the bottom of the box.
Step 7: Connecting the Output Terminals
With the soldering iron I made four holes in the lid of the box and bolted the terminals to the lid and connected the wires in order.
From left to right, sine, common, square low square high.
Step 8: The Finished Signal Generator
I marked the on and off switch 0 and 1.
I marked the frequency range switch A and B.
I marked the pots low side with 0.
And I marked the terminals S for sine, C for common, SL for square low, and SH square high.