U can Use a comparator IC like LM324 or LM 329. Both are a very cheap and reliable ICs. Rajiv Thakur ----- Original Message ----- From: "Deva Seetharam" To: Sent: Friday, September 27, 2002 10:35 AM Subject: [EE] saving lithium battery. > hi > i dont have much experience in designing/buidling hardware. > > i have a problem with a project. pls. see if u can help. > > we have a simple board based on pic 16f877. a lithium battery powers the > circuit. the spec for the battery specifies that if the battery ever goes > below 3v, the battery would be permanently damaged. > > now, how to constantly monitor the remaining power? how to > turn off the circuit when the battery power reaches the 3v range? can we > do this without adding too many components? > > thanks in advance, > Deva Seetharam > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu