I am busy converting an 8mm projector to capture single frames. I have started with this project, but am now stuck. I use a Eumig 610D projector.
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The design of the system incorporates the facility for single frame capture using a computer and appropriate software (cinecap). The software receives an on / off signal every time a frame of film is in the gate. (Using a camcorder to capture the images via firewire). This is sent to the software by a modified mouse via usb and Cinecap forms an AVI file.
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As the film is transported through the projector at 3 frames per second it causes the tensioner to trigger a microswitch.
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This signal is passed to the microswitch in the modified mouse which in turn tells 'cinecap' to capture a frame of film.
The weakest part of the system is the microswitch triggered by the film tensioner of the projector. The micro switch does not always trigger, so I lose frames. Otherwise everything works fine.
Someone then suggested to build a circuit using an IR receiver and two resistors.
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He then connected this small part to the mouse. He placed the reflective sensor (IR receiver) close to the shutter blades and by painting one of them white and the other two matt black he got a pulse once per frame.
**broken link removed** He put the sensor on an L shaped piece of strip board so it can just fit in and used a tie wrap to hold it to a mounting post nearby. The screw on the board is used to protect the detector. He commented that he is not dropping frames.
I need a simple explanation what components I need and an easy diagram how to build the section starting from the IR receiver which will receive the impulse to the mouse which will be triggered..
Thanks for any advice
**broken link removed**
The design of the system incorporates the facility for single frame capture using a computer and appropriate software (cinecap). The software receives an on / off signal every time a frame of film is in the gate. (Using a camcorder to capture the images via firewire). This is sent to the software by a modified mouse via usb and Cinecap forms an AVI file.
**broken link removed**
As the film is transported through the projector at 3 frames per second it causes the tensioner to trigger a microswitch.
**broken link removed**
This signal is passed to the microswitch in the modified mouse which in turn tells 'cinecap' to capture a frame of film.
The weakest part of the system is the microswitch triggered by the film tensioner of the projector. The micro switch does not always trigger, so I lose frames. Otherwise everything works fine.
Someone then suggested to build a circuit using an IR receiver and two resistors.
**broken link removed** **broken link removed**
He then connected this small part to the mouse. He placed the reflective sensor (IR receiver) close to the shutter blades and by painting one of them white and the other two matt black he got a pulse once per frame.
**broken link removed** He put the sensor on an L shaped piece of strip board so it can just fit in and used a tie wrap to hold it to a mounting post nearby. The screw on the board is used to protect the detector. He commented that he is not dropping frames.
I need a simple explanation what components I need and an easy diagram how to build the section starting from the IR receiver which will receive the impulse to the mouse which will be triggered..
Thanks for any advice