The battery life of these devices are typically not affected by the device being powered. The battery life is determined primarily by the shelf life of the battery. The battery drains itself more than the device which under standby power, when the Vcc goes below 4.5 V and is powered with at least 2 V to retain memory, draws less than 1 uA.
This has been a good feature in some SRAM for over 20 years and Dallas Semiconductor did some excellent jobs with these devices, even with some micorcomputers like the 87C51 series. I've used them in a number of non-ham applications. Just have to get use to addressing them. 73, ron, n9ee/r >From: Mike Morris WA6ILQ <[EMAIL PROTECTED]> >Date: 2007/11/11 Sun PM 02:28:58 CST >To: Repeater-Builder@yahoogroups.com >Subject: Re: Re: [Repeater-Builder] RC-96 Controller Problem > >I don't have my Dallas Semi book handy, but if I remember correctly >the "10 years" >spec was 10 unpowered years - if the Smartwatch was in a device that >was powered >up the battery was not being drained. But you still had to factor in >the shelf life of the >internal coin cell. > >At 03:44 AM 11/10/07, you wrote: >>Eric, >> >>As Kevin said if your 96 has one of the Dallas Smartwatch the >>battery in some of them had a life of 10 years. It was basically >>the shelf life of the battery. >> >>Most of the Smartwatch's I've seen used a RAM as the memory rather >>than a EPROM. The battery maintained the memory when power was >>lost. The battery could power and maintain memory for the life of >>the battery which again was spec'd for 10 years although most often >>lasted 12-14 years. Kinda gets into the area of some rigs having >>their OS in battery backed RAM. >> >>The Smartwatch was made by Dallas Semiconductor. >> >>73, ron, n9ee/r >> >> >> >> >> >From: "Kevin Berlen, K9HX" <[EMAIL PROTECTED]> >> >Date: 2007/11/10 Sat AM 02:42:39 CST >> >To: Repeater-Builder@yahoogroups.com >> >Subject: Re: [Repeater-Builder] RC-96 Controller Problem >> >> > >> >What version of software is in your controller? With rev 5 of >> thesoftware, a Dallas >> >Smartwatch was added to the RC-96 to provide a real-time clock. As >> Irecall, the >> >smartwatch occupied one of the eprom sockets, and the affected >> eprom wasplugged >> >into a socket on top of the device. If yours has the smartwatch, >> it maybe the culprit. 73. >> > >> >Kevin, K9HX >> > >> > >> >At 10:10 PM 11/9/2007, you wrote: >> > >> >One of the repeaters I maintainhas been working perfectly for almost a year >> >since its last checkup. It is a 6m repeater that has a link toseveral >> >other 6m repeaters, and is controlled by an ACC RC-96 controller. Itis >> >powered from a very large commercial UPS that ensures no-breakpower. >> > >> >One evening, the controller went berserk, for no apparent reason. It >> >started transmitting a string of Morse characters on both the primaryand >> >secondary ports: "dit dah dit ... dah dah dah dah dah dah dah dahdah dah >> >..." for about two minutes. It would then be quiet on both ports forabout >> >30 seconds, and would then repeat. During the brief silent periods,the >> >repeater would operate as a repeater, but the Morse string muted anyother >> >audio, once it began. The controller would not respond to my DTMFcommands >> >on either the primary or secondary ports. To make matters worse, the >> >telephone line that gives me backup control to knock down the repeaterwas >> >dead at the hilltop end! I had to make a hasty trip to the mountaintopsite >> >to take the beast off the air. >> > >> >As a result of this experience, I am adding a dedicated UHF control linkto >> >give me positive control of the repeater. >> > >> >Has anyone else had a similar problem with the RC-96 controller? Notethat >> >there is no lithium or similar memory battery inside the box that mightgo >> >bad. Oddball malfunctions like this can add more gray hairs than Iwant! >> >Any ideas, case histories, or suggestions will be appreciated. >> > >> >73, Eric Lemmon WB6FLY >> > >> > >> > >> >No virus found in this incoming message. >> >Checked by AVG Free Edition. >> >Version: 7.5.503 / Virus Database: 269.15.26/1119 - Release >> Date:11/8/2007 5:55 PM >> > >> > >> > >> > >> >No virus found in this outgoing message. >> >Checked by AVG Free Edition. >> >Version: 7.5.503 / Virus Database: 269.15.27/1121 - Release Date: >> 11/9/2007 7:29 PM >> >> >>Ron Wright, N9EE >>727-376-6575 >>MICRO COMPUTER CONCEPTS >>Owner 146.64 repeater Tampa Bay, FL >>No tone, all are welcome. >> >> >> >> >> >> >> >>Yahoo! Groups Links >> >> >> > > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
