THREE TIMER CIRCUITS

Three Timer Circuits Timer circuits are handy for many experimenters’ laboratory functions, not to mention the photo or PC lab. This kit is another threein-one in that all three circuits are complete and separate; simply using different types of circuits to do exactly the same job. All come complete with 5 amp relays for controlling pretty significant loads. All may be operated on battery or light weight (9V DC) supply. The advantages and disadvantages of each design are discussed in the text.