Can't find the right timer

Can't find the right timer

Post by DrumBo » Fri, 04 Jul 1997 04:00:00



This is my first time on a newsgroup, so pardon me if it is miswritten.

I am planning to build a rocket with a 35 mm camera in it.  I have tried a
 555 w/ a relay, a LED pulser, and a transistor+capicator circit, but none
seem to work.  there is a 556 circit in the "555 digital IC circit"
mini-book from Radio Shack, does it work better??  Any timer Ideas
welcome.
I want to be able to take as many pictures as possable in one flight.


Thank you!!

 
 
 

Can't find the right timer

Post by Louis P. Catozz » Fri, 04 Jul 1997 04:00:00


Quote:

> This is my first time on a newsgroup, so pardon me if it is miswritten.

> I am planning to build a rocket with a 35 mm camera in it.  I have tried a
>  555 w/ a relay, a LED pulser, and a transistor+capicator circit, but none
> seem to work.  there is a 556 circit in the "555 digital IC circit"
> mini-book from Radio Shack, does it work better??  Any timer Ideas
> welcome.
> I want to be able to take as many pictures as possable in one flight.


> Thank you!!

   The 556 is just a dual-packaged 555 - no help there.  Does the camera
you plan to use have the feature that as long as the shutter is
depressed (electronic switch remains closed) it will take picture after
picture?  If that is the case then forget the timer circuit and just
set up so that the shutter is closed at launch and remains closed until
you run out of film - a Normally Closed relay or spring switch held open
with a piece of string tied to the launch pad works good.

--
________________________________________________________________________
Lou Catozzi                IBM RS/6000 Division          Visual Systems

Tel: (512) 838-4065           Austin, Texas              Administration
                                 --oOo--

 
 
 

Can't find the right timer

Post by Bob Kapl » Sat, 05 Jul 1997 04:00:00



Quote:
>    The 556 is just a dual-packaged 555 - no help there.  Does the camera
> you plan to use have the feature that as long as the shutter is
> depressed (electronic switch remains closed) it will take picture after
> picture?  

Sadly, the only cameras I've ever seen with this very nice feature were the
Ricoh Shotmasters, which have been discontinued. They even had a small
earphone jack that could trigger the camera with a simple "refrigerator man"
switch". If anyone knows where to get one of these cameras today, PLEASE let
us know (tell me first thou...).

        Bob Kaplow      NAR # 18L       TRA # "Abort, Retry, Fail?"