Hello,
I am kinda new to circuits and am struggling with a problem.
Please see the attached schematic with explanation.
The problem I am having, is the power source I am using ramps up and down very fast from 1v-3v. I have been boosting this to 8v and powering the lm317 circuit directly, but it takes too long to turn on and off. Instead, I would like to get rid of the 8v booster and use that <1v-3v power source as a TTL/PWM input... I would power the circuit with a 12vdc always-on source.
I have gotten as far as the attached schematic... Ive tested it by touching the inside isolator pins with a screwdriver, it does work like i wanted and turns on the transistor + laser circuit.
I need to know what to put before the opto-isolator so it will turn on when above 2v, and off when below 2v... and not burn out.
Any help is greatly appreciated!
Thank you
I am kinda new to circuits and am struggling with a problem.
Please see the attached schematic with explanation.
The problem I am having, is the power source I am using ramps up and down very fast from 1v-3v. I have been boosting this to 8v and powering the lm317 circuit directly, but it takes too long to turn on and off. Instead, I would like to get rid of the 8v booster and use that <1v-3v power source as a TTL/PWM input... I would power the circuit with a 12vdc always-on source.
I have gotten as far as the attached schematic... Ive tested it by touching the inside isolator pins with a screwdriver, it does work like i wanted and turns on the transistor + laser circuit.
I need to know what to put before the opto-isolator so it will turn on when above 2v, and off when below 2v... and not burn out.
Any help is greatly appreciated!
Thank you
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