12 Volt Night Light, Dark-activated, for under $4 Gerhard Dekker copyright 1991 Gerhard Dekker Those of you living with small children can appreciate the convenience of a low power light source in the bedroom, bathroom, or hall that stays on all night. The design presented here draws only 25 mA., will turn off at dawn and on at dusk, further reducing power consumption and extending blub life because the bulb never sees the higher line voltage when your solar modules are active. Power consumption over a typical 12 hour night will be replenished in 6 minutes by one 3 amp solar module. The parts are available at Radio Shack stores and construction of the circuit is very simple. I stuck the parts through holes poked in a 1" by 1" piece of light cardboard and soldered the appropriate leads together. The power supply wires can be very thin (#30 AWG) or whatever you have. Care must be taken that the CdS cell doesn't see the blub, or any light reflected by it from within 24", as this will decrease the light output. With the blub stuck in a little tin foil reflector there is a surprising amount of light, more than adequate for night light duty. I've had one of these going for 6 years now, still on the original blub! Parts List: resistors- 1M and 1K Ohm, 1 each 2 transistors- NPN type 2N2222 One CdS photo resistor- 500 to 1M Ohm (RS#276-1657) One blub- 25 mA, 12 volt, comes with leads, (RS# 272-1141) INSERT CIRCUIT DIAGRAM Access Gerhard Dekker, Box 689, Steinbach, Man. Canada R0A 2A0 ù 204-434- 6143.