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Step 13Step 2i: lead bending & soldering - finish
With the variable capacitor in hand, it is time to finish the circuit build.
Attach the variable capacitor C4 to the circuit in parallel with the capacitor C3 as shown schematically in Figure 1 and seen in the photo Figure 2.
You may need to "boost" the height of the switch S1's button so that it gets pressed closed easily when the variable capacitor C4 is "mashed" down on the electronics board. Do this by adding a shim made of a small scrap of G10 board (or whatever) to the top of the switch. Attach the shim to the switch's button with a small bit of double-stick foam tape.
At last. Install the CMOS 4093B IC in the 14 pin DIP socket, plug in the 9V battery and test the circuit. It should sound something like the mp3 file found at this link: <tribble.mp3tribble.mp3>. Try "mashing" the variable capacitor (you will need to insulate it, and all the rest of the electronics, from your hand) and note the change of pitch.
Once the electronics are working up to expectations it is time to build a fur casing, stuff the electronics into it, and finish the build.
Attach the variable capacitor C4 to the circuit in parallel with the capacitor C3 as shown schematically in Figure 1 and seen in the photo Figure 2.
You may need to "boost" the height of the switch S1's button so that it gets pressed closed easily when the variable capacitor C4 is "mashed" down on the electronics board. Do this by adding a shim made of a small scrap of G10 board (or whatever) to the top of the switch. Attach the shim to the switch's button with a small bit of double-stick foam tape.
At last. Install the CMOS 4093B IC in the 14 pin DIP socket, plug in the 9V battery and test the circuit. It should sound something like the mp3 file found at this link: <tribble.mp3tribble.mp3>. Try "mashing" the variable capacitor (you will need to insulate it, and all the rest of the electronics, from your hand) and note the change of pitch.
Once the electronics are working up to expectations it is time to build a fur casing, stuff the electronics into it, and finish the build.
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