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| Built at: Jul.04.2002 Last update: Dezember 06, 2004 |
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Diese Seite ist auch in Deutsch verfügbar. |
About my help circuit for camera triggering with Microcontroller, the Two Step Trigger TST01, I reported on 01-14-2001. Now I have written a new software for the circuit with this you can determine the trigger moment more exactly.
Who is interested at this new software can get in touch with
me by mail. I will sendl you the assembler sourcecode "tst
03-c.asm" by e-mail.
KAPfs@freenet.de
Problem:
Cameras, also digitalcameras, have a triggerdelay. That
means that the camera dosn´t trigger at the same time that the
triggerbutton is pressed. In KAP-use the best situation can be
away befor the camera does the shoot.
Solution with a microcontroller:
The new software tst-03b moves the triggerservo into the
measuringposition if the triggersignal from the transmitter is
given. If the button at the transmitter is leaved, the servo
moves into the triggerposition and the camera triggers without
the long triggerdelay. So the KAPer can arm his object, press the
button and when the perfect situation is given he leaves the
button and the camera shoots undelayed (so I hope) :-).
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The ready built circuit of the
TST01 is only 28 x 40 mm in size. It is plugged
between the receiver and the trigger servo. With the eight switches you can adjust the servomovements and the triggertime for different KAP-Rigs and cameras. The LED´s D1 and D2 show the timing. D1 is switched on in the MEASURING position, D1 and D2 are on in the TRIGGER position. The hardware for the new software is not changed. If you want to know more please look here. You will find the complete hardware information. |
The triggerservo of the KAP-Rig is controlled in two steps as follows:
Normal situation:
The triggerbutton at the transmitter is not pressed or
the stik is in the neutral position. The servo is in the position
NEUTRAL.
Step-1, MEASURING:
If the KAPer presses the triggerbutton at the
transmitter, the servo moves from the NEUTRAL position to the
MEASURING position and the camera beginns with the measuring. The
position of the servo for this funktion of the camera can be
controlled with some DIL-Switches. The KAPer than has to hold the
button down until the camera should trigger.
Step-2, TRIGGER:
The KAPer looks for the right moment to trigger the
camera. Then he leaves the button and the triggerservo moves into
the position TRIGGER. At this moment the camera triggers with no
delay. Also this position of the servo can be controlled with
some DIL-Switches too. The servo holds the triggerposition for a
little time and than it moves back into the position NEUTRAL.
Adjusting of the servomovement and the triggertime
with the 8pol DIP-Switch:
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With the 8 DIP-switches the TST01 can be
adjusted to the Rig and the camera as follows: S1: Triggertime, 0,5 or 1 sec. S2: Servoposition
MEASURING low bit S6: Servoposition TRIGGER low bit |
Enjoy building the TST01 and of course enjoy KAPing with the Two Step Trigger and the new software.
Links to other KAPers and more you can find in my Surfers Guide.
I like to be available for questions, suggestions or experience exchange.
I would be very pleased about an entry in my visitor's book.
Manfred
http://KAP-Man.de
Manfred