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Step 2Building the circuit
Cut a piece of perfboard in a shape suitable for the top of your toothbrush case.
Solder at the top the seven LEDs, shorter pin is Cathode, the one that goes to ground. Better mark a black spot on the side of the LED's case before you cut the wires to correct lenght.
Solder one pin per LED first, align them in a row, solder the other pin of each LED.
Solder the socket in place, pay attention to position of pin no.1 (the one with the dot). Do not mount the micro on the socket for now.
Solder the crystal and the seven resistors.
Start wiring with very thin enameled copper wire.
One resistor and capacitors can be soldered on the solder side.
Connect battery holder un pushbuttons with thin plastic insulated wire.
The battery holder can be made out of thin cardboard: cut a square of cardboard the size to make one round around the two batteries. Hold with some scotch tape. Wrap another sheet of cardboard and hold again with scotch tape. Remove batteries and inner cardboard. The removed sheet of cardboard served to give batteries some room and slip easily inside the tube. The two electrical contacts can be taken from a broken toy or another electrical piece of equipment.
Buon divertimento ! Have fun !
Solder at the top the seven LEDs, shorter pin is Cathode, the one that goes to ground. Better mark a black spot on the side of the LED's case before you cut the wires to correct lenght.
Solder one pin per LED first, align them in a row, solder the other pin of each LED.
Solder the socket in place, pay attention to position of pin no.1 (the one with the dot). Do not mount the micro on the socket for now.
Solder the crystal and the seven resistors.
Start wiring with very thin enameled copper wire.
One resistor and capacitors can be soldered on the solder side.
Connect battery holder un pushbuttons with thin plastic insulated wire.
The battery holder can be made out of thin cardboard: cut a square of cardboard the size to make one round around the two batteries. Hold with some scotch tape. Wrap another sheet of cardboard and hold again with scotch tape. Remove batteries and inner cardboard. The removed sheet of cardboard served to give batteries some room and slip easily inside the tube. The two electrical contacts can be taken from a broken toy or another electrical piece of equipment.
Buon divertimento ! Have fun !
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