Intro: Music Box Circuit From 555-timer-circuits.com
This is how I built the Musc Box Circuit from 555-timer-circuits.com/music-box.html
Step 1: Prototype and Test
First thing to do is plug in all the parts into a bread board and test it. Just follow the schematic to hook it up.
Step 2: Plan the Controls Placement
Figure out where you are going to place the controls for this. If you plan on being able to change the song it plays you might want to use some potentiometers instead of plain ole resistors.
If you don't know how to read schematics look it up. Or try to understand my explanations.
The resistors are the rectangles with the numbers and K on them. For Mine I used 1 500k potentiometer and 9 100k potentiometers.
The way I planned where to drill the holes for the controls was taped a piece of paper to the lid. Then I put the potentiometers where I wanted them. Then I used a marker to place a mark where the hole should be.
Then I drilled all the holes and put the potentiometers in.
Step 3: Prepare the Potentiometers
Some potentiometers have a little tab that makes it harder to place them. You can just break that tab right off with a pair of pliers.
After their broke off put them in the holes and screw on the nuts.
Step 4: Add Knobs
Put the knobs on your potentiometers.
Step 5: Solder in the IC's
I used a prototype board from Radio Shack that has the same layout as the breadboard to make it easy to transfer your prototype.
Step 6: Figure Our Wire Placement
Now to help remember where the pins of the IC's connect to the potentiometers I taped the pin numbers to the bottom of the potentiometers.
Step 7: Solder in the Diods and Capacitors
Now I added the Diods and Capacitors to the board. The Diodes are the symbol with the triangle and a line on it. The line is the negative and the triangle is the positive. On the diode itself the negative side should have a line too. On the capacitor the side with the line is the negative.
Step 8: Solder Wires to the Potentiometers
Now solder the wires to the potentiometers in the correct order. Or for fun do it in a random order. I used a little round circuit board to connected all the potentiometers to pin 5 of the other 555 that need to be connected to it. Also after doing the whole thing and playing with it alot I think next one I build I will use 50k potentiometers for the tone instead.
Step 9: Add and Output
For the output I used a Mono headphone jack. You can use whatever you want. I built an Atari Punk Console with alligator clips as the outputs once. The output is connected to the negative of the 10uf capacitor on the right side and negative. I also drilled a hole in the side of the box for it.
Step 10: Add Power and a Power Indicator
The schematic does not include for an LED or power switch. I added those. To add a switch I put the positive through the top right pot which has a switch on it. I think its a SPST or Single Pole Single Throw. From the positive coming out of the switch I put a 470 ohm resistor before the positive of the green LED. Then the negative of the LED to the negative rail on the prototype board. I also used two sided tape to hold the battery in place.
Step 11: Now Test It.
plug in you speaker and play with it.