untitled
Insert one 2 kohm resistor (R19), two 47 kohm resistors (R20 and R21), one 100 kohm resistor (R22), one 5 kohm resistors (R21), ...
Let there be lights .............................................................................. All the brains of the circuit ...
Drill holes for the LEDs at the locations you marked in Step 3. With a permanent marker or paint brush, draw the musical notes ...
Attach resistors between the pairs of LEDs, as shown in Figure 5-16. Attach the resistors to the short lead on one LED of each ...
Figure 5-15: A bit of our favorite song created from marker and LEDs. Wires connecting transistor collector pins to terminal blo ...
Figure 5-17: A close-up of the soldering job. Figure 5-16: Resistors soldered and leads clipped. Chapter 5: Making Light Dance t ...
Be sure to heed all the safety precautions about soldering that we pro- vide in Chapter 2. For example, don’t leave your solderi ...
You will connect each of these eight wires to a terminal block. The upcoming Figure 5-20 shows these connections close up. Figur ...
Clip the LED leads just above the solder joint. Make sure that the LED leads and solder joints don’t touch each other. Coat the ...
Drill holes in the box where you will insert the microphone and on/off switch. We put both the potentiometers and on/off switch ...
Insert the wires from the LEDs, battery pack, and the on/off switch to the terminal blocks on the breadboard, as shown in Figur ...
As you insert the wires, cut each of them to the length needed to reach the assigned terminal block and strip the insulation fr ...
You can use any music you like to get the effect going, but we found that music with lots of instruments — like a swing band wit ...
Put on some music. That’s it! Watch the lights go on an off in response to the high and low frequencies in the music. You can a ...
114 Part II: Sounding Off! ...
Chapter 6 Focusing Sound with a Parabolic Microphone In This Chapter Looking over the circuit Organizing the parts list Putti ...
You can see the finished parabolic microphone (and our own author, Earl, lurking behind it) in Figure 6-1. Figure 6-1: Parabolic ...
Here are the types of activities that you’ll be doing to create your own para- bolic microphone. You will Put together An elect ...
The following is a list of the schematic elements for your parabolic microphone: The circuit starts with the electret microphon ...
dish’s original finish. Note:Before painting, be sure to wipe off the dish to get rid of dust or smudges because spray painting ...
«
2
3
4
5
6
7
8
9
10
11
»
Free download pdf