Multiple Satellite Connection on DiSEqC Switch

The DiSEqC switch project is an individual satellite system widely used for connecting up to 16 satellites to one receiver with the use of cascading method.

There are other cheap DiSEqC switches that is used by this switch project which can have four satellite heads each or simply direct connection to satellite heads to function as a simple switch. The higher versions of DiSEqC switches are backward compatible which means they can operate together with older versions. Four LEDs are used to indicate the ON/OFF state of ports of a DiSEqC switch.

A 12VDC power supply with 200mA maximum is used to power the device. Since it uses 4 LEDs internally, the port quantity to monitor is also 4. There are two levels of 22kHz tone consisting of 300mV and 650mV. Depending on the version of firmware, the frequency of the switch can be 1Hz or 2Hz. The blinking of the LED along with sound indicates the commands. The device also contains short circuit protection with sound indication.

An AVR ATtiny13-20PI microcontroller is the heart of DiSEqC tester where the red, blue, and yellow wires are connected to ports in any order.

Rest of the project