Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site anasazi.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!harpo!decvax!genrad!panda!talcott!harvard!seismo!hao!noao!terak!anasazi!john From: john@anasazi.UUCP (John Moore) Newsgroups: net.analog,net.ham-radio Subject: Current Measurement, Solar Power Message-ID: <266@anasazi.UUCP> Date: Sun, 18-Aug-85 00:34:46 EDT Article-I.D.: anasazi.266 Posted: Sun Aug 18 00:34:46 1985 Date-Received: Sat, 24-Aug-85 01:36:08 EDT Distribution: net Organization: Anasazi, Phoenix Az. Lines: 19 Xref: watmath net.analog:424 net.ham-radio:3077 I am working on a project for a solar powered radio site. We need (for obvious reasons) to be able to measure battery charging currents. The solar system is charging a 12 Volt battery. A TTL uC (68705R3) will be used for telemetry, and it has an 8 bit ADC with 0-5V input range. The question is: How can I measure the charging currents (0-200 Amps) to 5% accuracy without incurring significant voltage drop, and using the ADC described above? Does anyone know of current transducers which are commercially available? (We would rather buy than build unless the solution is pretty simple - the site is accessible only by helicopter and is not a great place for experimenting.) John Moore (NJ7E) {decvax|ihnp4|hao}!noao!terak!anasazi!john (602) 952-8205 (day or evening) -- John Moore (NJ7E) {decvax|ihnp4|hao}!noao!terak!anasazi!john (602) 952-8205 (day or evening)