Each one is supplied complete with all components and a separate PCB. Each has a relay output (except 3085_3 which has a 12Vdc output). So you can either purchase all three timers in the one pack (order code 3085) or individually (see 3152, 3085_2 and 3085_3 for details).
The first circuit is a traditional 555 timer circuit but also shows how to extend the timing period to the maximum. The second uses a 555 timer IC to switch a binary counter for time periods from seconds to years! The third circuit uses an electrolytic capacitor's discharge characteristics to time a period from about 2 seconds to 6 minutes.
Timing periods for all three circuits can be altered by substituting different component values (not supplied). Please refer to the individual kits for full product descriptions.
This three-in-one kit makes a good introduction to timer circuits. Full details are provided.Specifications
|Supply Voltage||Regulated 10 - 15Vdc|
|Current consumption||<1mA standby, <35mA active (no load)|
|Output Signal||12Vdc, 500mA max load (see text)|
|Dimensions (mm)||~ 45W x 60L x 20H|
|Board Connections||Screw terminal blocks|
|Product Formats||SELF-ASSEMBLY Electronic Kit (KT) Product Formats Info|