No one can call themselves an electronics hobbyist unless they have built a timer. There are several designs using a variety of new and sometimes old circuits. Witness the longest surviving IC of all, the 555, introduced over 20 years ago. Most timers have one characteristic � they only timed one thing; an egg timer, a delayed timer, a timeout timer, a flasher, a photographic timer, etc. As you will see these days are almost over. L: 3 3/4� x W: 1 7/8� x H: 3/4" Requires external 9-12 volt DC power supply 7 different modes (dipswitch selectable)
Microcontrollers have changed all that. This kit contains seven different timing modes using only ONE IC and some support components on a single-sided PCB. This is a lot less than many single-mode traditional timers. The timing modes and delay ranges are selected by on-board DIP switches. Simply select the time delay you want and that�s it � no adjustment required.
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