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This Web site is dedicated to the thousands of "users" of my programs, those who have helped test my programs over the last 22 or so years, and especially those who shared their experiences with me.
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This section has some text and one schmatic that have been derived from the old v2.5 CAD manual, and should for the most part also be relevant to v2.6. For any versions subsequent to v2.6 you may need to do some alterations. Please read all the instructions in the other parts of this HTML documentation before trying to build the cine film recorder and the computer controlled cine film solenoid circuit. This description, of the cine film recorder and the computer controlled cine film solenoid circuit, is intended only for use in testing DANCAD3D.EXE (tm).
See also Section: 3.80.0.0 and Section: 9.75.61.0 for information about DANCINEL.EXE (tm) to display 2048x1536x32 high resolution Digital Cinema like image frame files on the monitor in your cine film recorder and have DANCINEL.EXE (tm) automatically operate the cine film camera and filter wheels.
See also the video about building a cine film recorder in Section: 4.0.0.0.
Steps to build a computer controlled cine film solenoid circuit:
Purchase all of the electronic parts.
Purchase a shielded enclosure to hold the finished circuit.
Drill the enclosure to support the circuit, transformer, power cord, and relay.
Wire up your audio output signal tap in such a way as to safely draw off just the right amount of audio or ultrasonic signal from your computer's speaker terminals. Be sure that your connections are of high enough impedance, and have DC blocking capacitors rated for high voltages to isolate your circuit from your computer's mother-board.
Wire up the circuit and connect the relay, solenoid, power transformer, and power cord. Do not plug in the power cord until all the other connections are made, and the cover is on the circuit box. The solenoid may close when you plug in the audio, so boot your computer and connect the signal wires before you plug in the power to the circuit.
Test the amplifier and relay by using the macro SIGNAL command.
CINE CAMERA SOLENOID AMPLIFIER CIRCUIT: The circuit drawn out in the drawing "CINE1" is the circuit I used in my solenoid cable release actuator. Basically the signal produced at the computers loud speaker is amplified enough to close a 12 volt DC relay, which in turn makes a 120 volt AC solenoid close. The solenoid operated a lever that increased the stroke of the solenoid from 0.75" to about 1.25". The lever pushed on the cable release, and the other end of the cable release pushed on the cine cameras single frame button. The BOLEX (tm) camera has a time exposure mode, so that as long as the single frame button was pushed in the shutter stayed open. The duration parameter of the macro SIGNAL command thereby controlled the exposure time of the film.
The input of the signal is taken from the capacitors C1 and C2 and the resistors R1, R2, and R3 which I soldered directly onto the computers loud speaker. R1 and R2 prevent the computers audio output circuit from being over loaded by the amplifier since the 200 ohm load is small when taken across an 8 ohm speaker (the more the ohms the less drive current that is required.) For additional Isolation and RFI reduction the signal is passed through an audio coupling transformer L2. The two stage hi-gain amplifier makes the signal strong enough to be rectified by D1 to make a DC control signal to operate Q3 and Q4 so that the relay will reliably close when the signal is present. Resister R11 can be adjusted to make the collector of Q2 come to half the DC supply voltage, i.e. 6 volts if the 2N2222 you are using differs from the one I used due to manufacturing tolerances. The varistor is to protect the amplifier from the high voltage spikes produced by the solenoid when the relay opens and closes. Try to keep the amplifier board away from the solenoid since the magnetic field from the solenoid can be picked up by the audio transformers. The amplifier and other signal wiring should be enclosed in a metal box to shield against RFI (radio) and other interference. I constructed the solenoid device on a radio type chassis box putting the electronic parts inside and the mechanical parts on top. The complete unit was built in a few hours with hand tools, and cost about $50 to $75.
CINE1 CIRCUIT PARTS LIST: L1 ................................. The computers 8 ohm loud speaker. L2, L3 .... Small 600 ohm primary 900 ohm secondary audio transformer. L4 ..... 12 volt relay with normally open 120 volt AC 15 amp contacts. L5 ......... 120 volt AC washing machine solenoid, about 5 to 10 amps. L6 ..... 120 volt AC primary 12.6 volt AC secondary 1 amp transformer. R1, R2, R8, R13 ........... 100 ohm 0.25 watt 5% carbon film resister. R3 ....................... 100K ohm 0.25 watt 5% carbon film resister. R4, R9 ..................... 2K ohm 0.25 watt 5% carbon film resister. R5, R10, R16 ............... 1M ohm 0.25 watt 5% carbon film resister. R6, R11 ................... 22K ohm 0.25 watt 5% carbon film resister. R7, R12 .................... 1K ohm 0.25 watt 5% carbon film resister. R14 ...................... 2.2K ohm 0.25 watt 5% carbon film resister. R15 ....................... 10M ohm 0.25 watt 5% carbon film resister. C1, C2, C3, C6, C11 ................ 0.1 mf 50 volt ceramic capacitor. C4, C7 .............................. 22 pf 50 volt ceramic capacitor. C5, C8 ........................ 100 mf 25 volt electrolytic capacitor. C9 .............................. 5 mf 25 volt electrolytic capacitor. C10 ................................. 47 pf 50 volt ceramic capacitor. C12 .......................... 2000 mf 25 volt electrolytic capacitor. Q1, Q2, Q3 ............................. 2N2222 NPN signal transistor. Q4 ...................................... 2N3055 NPN power transistor. D1 ......................................... 1N914 small signal diode. D2 ............. 50 volt 1 amp full wave bridge or four 1N4004 diodes. V1 ........................ 120 volt AC varistor for spike protection. F1 ...................................... 10 to 15 amp fast blow fuse.
