Hello! This was a radio that I did for my daughter play
Video running radio:
The radio was made with old cardboard box, bottle caps, hot glue and some electronic components salvaged from broken appliances. But they are easily found in electronics stores.
Works as follows: By pressing the right button, turn on the radio, turning on a light in the center and emitted a sound that has a variable rate, adjusted by the button on the left. Not a real radio but the effect amplified by the acoustics of the sound box is pretty cool.
In this first section I will show the construction of the box.
- Pieces of cardboard box in the common size of three A4 sheets (210mm x 295mm);
- Cast of radios. (Pictures);
- Contact paper with a drawing of wood (2 designs of different shades);
- 10 toothpicks;
- 2 caps of soda bottles;
- Hot glue
Step 1: Cut and Assembling the Parts
Note: We made three segments: a quad to paste the base radio, a cut equal to more frontal part without the holes of the speaker and the buttons and a rectangle to be bent and glued around the skeleton of the radio.
The speaker was placed in front of a circle with toothpicks to be pleased with protection.
Assemble according to the figures.
In the figure, the speaker was placed, along with potenciêmetro only to verify the disposition thereof.
Step 2: Pasting the Contact Paper
The contact was cut with drawings on it. It was enough paste on top.
The buttons were made by gluing the buttons on the pot and the power switch on the inside of bottle caps, using hot glue.
After that, the buttons just fit and ready.
Step 3: Electronic Circuit
- Q1 = BC548 or equivalent transistor (NPN transistor for general use);
- Q2 = BC558 or equivalent transistor (PNP transistor for general use);
- FTE = 5cm speaker 8 ohms or 4 (taken from a sound box pc, old);
- S1 = simple switch (contact switch removed junk);
- B1 = 3 to 6 volts;
- P1 = 1M ohm potentiometer;
- R1 = 10K ohm resistor (brown, black and orange);
- R2 = 1K ohm resistor (brown, black and red);
- C1 = 10 microfarads electrolytic capacitor to 12 volts;
Miscellaneous: Bridge terminal to make the connections, support for cells, button to the pot, wire, solder, etc..
Note: Resistors 1 / 8 Watt power.
The circuit was mounted on a terminal strip as shown. I think it's pretty clear that the design and will offer no difficulty to those who venture to make an equal.
Just cut the wires from the pot, the speaker and key so you can distribute them in the box. After this, solder the components and lodging in the box.
I suggest not completely close the bottom of the radio to have access to a battery change.
Hope you enjoy.