| Many amateur photographers spend a disproportionate amount of their time in the dark-room. The exposure timer presented here can cut down...
More about Timer (129)
| *see text R1 045 TIMER WITH AUDIBLE WARNING RESET VI EMI ZIT) id 1 2 P1 * R2 5008 CAI9 220n 9V R3 c2 O Applications of this little circuit i...
| 051 GENERAL INTEREST D4 11441 48 I S1 15 09 013 1C3 4060 PI 0 5V 0 Bz O R8 680n BC547B 11•111•11 894071 - 11 DL TOnTOOR 16V 03 Re1 1N414...
| 056 MAINS POWERED TIMER This timer may be inserted in a power line to provide a controllable delay before a load is energized. It was develo...
| 111 EE February 1989 INTERMEDIATE PROJECT A series of projects for the not-so-experienced constructor. Although each article will describe i...
| This timer can be set to count a maxi- mum of 60 hours. It also allows an inter- val to be set. When this interval is reached, a buzzer soun...
| EE JULY/AUGUST 1988 Here is a simple "who"s the first" circuit that can be used in quiz games with up to eight participants or groups of par...
| EE JULY/AUGUST 1987 by A Behrens When, after developing, photo- graphs are immersed in the fix- ing bath at irregular intervals, it becomes...
| C1 100p 15V This low-cost timer circuit can offer switching intervals up to about 24 hours and may, therefore, be useful for a variety of do...
| 1511versatile timer This simple-looking circuit enables the arbitrary programming of seven outputs in a series of not more than 2048 (211) s...