Re: Help me solve this design problem PLEEEZ

bill.sloman@xxxxxxxx wrote:
> You need an up-down counter and a slow clock - a 32,768 Hz source as
> used in watches might serve as the clock, and counting five minutes of
> that needs a 24-bit counter, for which you could use the LSI LS7166
> 24-bit multimode counter (available ex-stock from Farnell). Multi-mode
> includes up-down ....
>
> Of course, any single chip microcontroller could handle the job - the
> Microchip Technology PIC series comes to mind (and Farnell have pages
> of variants for you to chose from) though the Atmel AVR parts are
> reputed to be nicer to work with. For this application you'd presumably
> clock the microcontroller at 32.768kHz.
>
> ------------
> Bill Sloman, Nijmegen
>


Or, of course he could do the dual 555 thing. One timer for "on time" and one
for "off time", which added with some logic gates allows the first timer to work
and produce an error condition. Sonalert module for audio alert. No 3 months
required to learn PICs.
.

Relevant Pages

  • Re: Help me solve this design problem PLEEEZ
    ... any single chip microcontroller could handle the job - the ... >> clock the microcontroller at 32.768kHz. ... which added with some logic gates allows the first timer to work ...
    (sci.electronics.design)
  • Re: Need help in converting YUV to RGB using OV7620
    ... PCLK at 5Mhz. ... Firstly you have NOT checked that your microcontroller can accept data ... ONE clock edge, whilst UV is clocked out at 10MHz by using the rising ... work either on BOTH edges of the PCLK signal or to two ports that can ...
    (comp.arch.embedded)
  • Re: need a prog to pause
    ... that comes to mind is to count about 5 clock ticks of the timer ... unsigned short temp = CLOCK; ... microcontroller can in a never ending loop to update a monitor display. ... However in about an hour the PC overwrites some values on the ...
    (comp.os.msdos.misc)
  • Re: PS/2 mouse interface with 8052 microcontroller
    ... >extra hardware I cannot interface the mouse directly with the UART ... >(serial port) of the microcontroller (mouse has data and clock lines; ... The mouse generates the clock, the data is latched on one of the edges,I forget ...
    (comp.arch.embedded)
Quantcast