When out of town I'm thinking of using an LDR with a 555-relay driver to periodically toggle the lights in a few rooms at night, and a thermistor near an incandescent bulb to kill the circuit when the bulb is sufficiently warm/hot.
This will involve placing the LDR, and the thermistor at some distance from the board which will be near the switchboard; a length of 8-12 feet.
In the case of HF/VHF circuits a pair of leads this long are not advised. Are there similar restrictions applicable to a simple driver circuit too?
How long a lead may be used to connect a component to a circuit?