Amplifier, clock
Archiver
Posts: 46,084
>Assuming an old clock has a mechanical movement, you might consider timing
>its periodic motion either optically or with a Hall effect sensor instead of
>using audio, for simpler electronics. Using a Stamp, you could time N clock
>ticks with elapsed time from a crystal-based counter. Let N be a power of 2
>for easy division. For ultimate accuracy, embed an Oregon Scientific atomic
>clock inside your old clock -- somewhat like using a modern computer chip to
>calibrate Babbage's Calculating Engine at the British museum.
>
>Dennis
>
>
Original Message
>From: dakota [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=RJ1zPgwr_pQoM4-vuogG2kX7Uia3UANDhZFTBeRcjoc5V8yyqy_TkfsINUl8rhdDGGYP_RnBBdoHgjmJVned]rfriedrich@a...[/url
>Sent: Thursday, January 25, 2001 3:34 PM
>To: basicstamps@egroups.com; basicx@egroups.com
>Subject: [noparse][[/noparse]basicstamps] Amplifier
>
>
>I want to make a stamp project to set the fast/slow control on an old clock
>rather than wait for a day to see if the clock is slow or fast I want to use
>a "tic" to start a timer and the next "tic" or even the next 15 or 60 to
>stop the timer. I then can rapidly set the speed regulator for the old
>mechanical clock.
>
>I need help with the amplifier - I would like to hold a microphone near the
>clock movement and have the electronics make a 0 to 5 volt transition.
You might find it fascinating to follow this link to Bryan Mumford's
site, and then to his precision horology pages. Bryan is active on
the PICs list.
http://www.bmumford.com
-- Tracy
>its periodic motion either optically or with a Hall effect sensor instead of
>using audio, for simpler electronics. Using a Stamp, you could time N clock
>ticks with elapsed time from a crystal-based counter. Let N be a power of 2
>for easy division. For ultimate accuracy, embed an Oregon Scientific atomic
>clock inside your old clock -- somewhat like using a modern computer chip to
>calibrate Babbage's Calculating Engine at the British museum.
>
>Dennis
>
>
Original Message
>From: dakota [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=RJ1zPgwr_pQoM4-vuogG2kX7Uia3UANDhZFTBeRcjoc5V8yyqy_TkfsINUl8rhdDGGYP_RnBBdoHgjmJVned]rfriedrich@a...[/url
>Sent: Thursday, January 25, 2001 3:34 PM
>To: basicstamps@egroups.com; basicx@egroups.com
>Subject: [noparse][[/noparse]basicstamps] Amplifier
>
>
>I want to make a stamp project to set the fast/slow control on an old clock
>rather than wait for a day to see if the clock is slow or fast I want to use
>a "tic" to start a timer and the next "tic" or even the next 15 or 60 to
>stop the timer. I then can rapidly set the speed regulator for the old
>mechanical clock.
>
>I need help with the amplifier - I would like to hold a microphone near the
>clock movement and have the electronics make a 0 to 5 volt transition.
You might find it fascinating to follow this link to Bryan Mumford's
site, and then to his precision horology pages. Bryan is active on
the PICs list.
http://www.bmumford.com
-- Tracy