Suggested by General Electric documentation from 1968, this circuit activates a relay after 60 seconds, keeping it closed. PUT is an uncommon component today.
Chinese 基本信息 > 出版社: 科学 (2007年4月1日) 平装 语种: 简体中文 ISBN: 7030186605 条形码: 9787030186607 品牌: 博库 ASIN:...
This very low consumption circuit can be powered by a solar cell. The time indication is given by a...
This circuit was published in a 1979 magazine, but it can still be easily assembled, as the...