Search Results for: Bells non-electric
bells and whistles just when i thought the design was pinned down, i realized there were times when i wanted to leave the monitor on for a half hour or so, not just seconds. for example, when i'm checking out a gps module. so, i added a new switch for "continuous" operation, designated as sw in figure
indicate a low battery. again, more additions — r , q , and r . when the battery drops below . v, the ltc output goes low, turning on the p-channel fet which puts the k (r ) in parallel with r , and raises the rate up to about hz. bottom line: hz = unit on; hz = change the battery. even with all these bells...
https://www.nutsvolts.com/magazine/article/february2011_goodsell