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Step 5GE AC Switch Circuit Board
Referring to the image:
1. RF antenna was removed to give more clearance.
2. Ground source.
3. +5v source.
4. Top leg of resistor R5 was de-soldered, so that the SIS-1
toggle output (pin 3 on SIS-1) could be connected. It's
through R5 that the transistor activates the relay.
5. These two lines run to an LED that lights when the relay is
active. I don't want an indicator, so I disconnected it;
However a diode connection is required here for the circuit
to work, so I moved the LED to the back of the circuit board,
so it's out of sight.
1. RF antenna was removed to give more clearance.
2. Ground source.
3. +5v source.
4. Top leg of resistor R5 was de-soldered, so that the SIS-1
toggle output (pin 3 on SIS-1) could be connected. It's
through R5 that the transistor activates the relay.
5. These two lines run to an LED that lights when the relay is
active. I don't want an indicator, so I disconnected it;
However a diode connection is required here for the circuit
to work, so I moved the LED to the back of the circuit board,
so it's out of sight.
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