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100 microfarad electrolytic capacitor (C4) LM386N-1 amplifier IC1 Of the many versions of the LM386 amplifier, we chose the LM ...
Washer with a^1 ⁄ 4 " inner diameter (ID) and 1^1 ⁄ 2 " outer diameter (OD) ^3 ⁄ 16 " ID rubber 0-ring ^1 ⁄ 4 " thick rubber ...
Taking Things Step by Step......................................................................... We’ve taken a lot of the pai ...
Building an amplifier circuit.............................................................. The first step in building a parabol ...
Insert wires to connect the IC and the terminal blocks to +V, and a wire between the two +V buses to connect them, as shown in ...
Insert wires to connect the ICs, terminal block for the microphone car- tridge, terminal blocks for the potentiometer (R2), ter ...
Mounting everything on the dish ..................................................... Time to assemble the handle that allows yo ...
In the sheet of gasket material, cut a hole (using your utility knife or X-ACTO knife) large enough to slip over the 1" threads ...
Drill a^3 ⁄ 8 " hole about eight inches from the end in the side of the PVC pipe that will be to your left when you’re holding ...
Cut four 6" pieces of wooden dowel. Cut a slot about one-third of the way through each dowel,^1 ⁄ 4 " from an end. The slot ha ...
Twist the free ends of the wires from the microphone cartridge together and feed the microphone wires through the PVC fittings ...
From the inside of the dish, put the^3 ⁄ 8 " inner diameter O-ring over the microphone cartridge and glue the O-ring to the was ...
Make sure you don’t get glue on the front side of the microphone car- tridge, or it could interfere with any sound coming throug ...
See Chapter 4 for more information about choosing drill bit sizes for par- ticular components and other advice on how to customi ...
Putting everything together.............................................................. After you have a completed breadboard, ...
Insert the wires from the headphone jack, potentiometer, phono jacks, battery pack, and the on/off switch to the terminal block ...
Secure the wires with wire clips where needed. The way that parts are laid out in this box as well as the distance between some ...
Trying It Out.................................................................................................. At this point, t ...
Get a bigger dish and set it up outside, hooked into speakers you set up in a permanent wildlife listening station either outdo ...
Chapter 7 Murmuring Merlin In This Chapter Scoping out the schematic Running down the parts list Breadboarding the wizard’s c ...
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