FORGET TO TURN off the ceiling fan in your bathroom? Install the simple timer in Figure 1. It's located out-of-sight in the fan unit, and you turn it on via the wall switch. The circuit costs virtually nothing, using "junk" parts. When ac power appears, a simple rectifier develops approximately 7V across filter capacitor C. This voltage powers the LM2905 analog timer and simultaneously triggers it via trigger-input Pin 1; output Pin 7 then goes low, turning on the solid-state relay and fan. Low-leakage capacitor [C.sub.T] and resistor [R.sub.T] set the time delay; for the values shown, the delay is 1000 sec, or approximately 17 minutes. At time-out, Pin 7 goes high, turning ...