Robert Suddenly Realized the Sand Beneath His Feet Was Kitty Litter

By Design News Staff -- Design News, February 3, 2003

All winter long, Robert basks in tropical temperatures right at home in upstate New York—thanks to an ignition timer system he designed for his ancient (1928) but efficient hot water boiler. At startup, the timer keeps the ignition on for 90 seconds while the burner comes to temperature. Tolerant of line noise and sags, it's designed to restart in the event of a line interruption longer than one second. Click here for details.

Are you a Gadget Freak? Allied Electronics would like to send you on a shopping spree of up to $500 on its website at www.alliedelec.com/gf.asp. E-mail Design News (dnonline@reedbusiness.com) your proposed project (must incorporate electronic components and involve sensing, motion, timing, and/or networking elements), along with a description of how it works, and a parts list.

If your project is selected, you'll receive the shopping spree of up to $500 and will be featured in an upcoming edition of Design News.

Boiler Ignition Timer System
Parts List
Amt	Part Description	Allied Part #
1	Resistor, Power	296-5404
2	Resistor, Carbon film	296-6340
2	Resistor Carbon film	296-6346
1	Resistor, Carbon film	296-6348
1	Resistor, Carbon comp	296-5644
1	Capacitor, Electrolytic	852-6686
1	Capacitor, Ceramic	881-5430
1	Capacitor, Film	998-2106
1	Diode	950-1102
1	Diode, Zener	568-0029
1	SCR	568-5079
1	IC, Programmable timer	735-1353
10	Neon Pilot Lamp	749-2100
1	Relay, 120VAC, SPDT	821-5101
Other supplies: Perforated vectorboard

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