This is the place for any magazine-related discussions that don't fit in any of the column discussion boards below.
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it is possible to keep tranking of real time on a basic stamp? if so, can be added a main id and a sub id numbers to a serial form? , i mean the time first and at what time de event hapens? any idea is welcome
It's not completely obvious to me what you are trying to accomplish but if it is for event logging then you have several issues: 1) as positronicle said, you will have drift 2) power issues ( 2a) battery drain or 2b) power outage if using a line connected power supply).<p>Also, handling all the time keeping functions can be pretty messy though not impossible.<p>I agree about using a real time clock chip. Most of them use a 32678 hz watch crystal - even the cheap ones have a 20 ppm accuracy (1.73 seconds per day). They have battery backup and switch into low power mode when main power is lost.<p>I particularly like the maxim DS1302. It reports date in BCD format (easy to print in readable form), has an SPI interface (for brain-dead easy access - basic stamp is no problem), great low power consumption when on backup power and has a trickle charger for a battery or supercap. The ds1302 is pretty cheap (2.50, I think) and maxim is very generous with free samples - they sent me 4 for just asking.<p>[ July 24, 2005: Message edited by: philba ]</p>
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