At 05:43 AM 2/8/00 +1000, you wrote: >At 09:37 7/02/00 +0800, you wrote: > >Hi All, > > > >Anyone have any recommendations as to a simple to use real time clock? I > >am designing a small standalone environmental logger incorporating a > >16F874 and need to timestamp the samples. > >Any suggestions welcome (though mainstream vendors are preferred as I am > >in Perth, Western Australia). > > >World Wide Electronic Components have a range of RTC chips. They are in >Perth and their prices are good. >You can download a nifty catalog (DOS based). >http://users.wantree.com.au:8080/~worcom/ >Another source is Bob Phillips (great guy) at Microzed. >http://www.microzed.com.au/ >Alternatively, 3.2768 Mhz crystals are available from Altronics (Perth) @ >$3.95 or Jaycar at $1. Coincidentally, I have just hooked up one of these >xtals to a 16F84 and used TMR0 and prescaler to generate 1 sec pulses. It >loses about 2 secs per day so I have to adjust the cap values. Tedious >without a frequency counter. Depending on how many you need, I have a large supply of surplus 4.194304 MHz crystals. The cost would be certainly < $1 each, depending on how many you want. Of course, the postage would affect the total. ================================================================ Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@lcfltd.com Least Cost Formulations, Ltd. URL: http://lcfltd.com/ 824 Timberlake Drive Tel: 757-467-0954 Virginia Beach, VA 23464-3239 Fax: 757-467-2947 "Vere scire est per causae scire" ================================================================