The integrated circuit CD4040 is a programmable divider. Its mission is to divide the present frequency in pin 10.
Now we’ll prepare the glass fiber. We are going to cut it a bit bigger than our design, leaving a small margin.
2X100W amplifier STK4231II rn
This circuit is made up of two integrated circuits: an analogue to digital converter (CA3162), and a decoder of seven segments (CA3161).
This circuit is composed of two integrated circuits. A digital analogue converter (CA3162) and a seven segment decoder (CA3161).
The third power cable is the one that’ll be connected to the fans. In our case, one in the front and another in the back part of the box.
2x10W amplifier LA4280.
On-off push button with a 12F675 microcontroller.
Digital clock with pic 16F84A.
This circuit is a simple digital volume control. The integrated circuit DS1669 is the one that increases or reduces the volume by means of two push buttons.
Pictures of some of the published electronics assemblies.
Twilight switch with 12F629 microcontroller .