I've built a prototype of a coil winding jig and I want to be able to count the number of turns.
At first I considered a mechanical counter but decided it would not be feasible.
I wanted to get someone's opinion on my new idea
I want to use a laser diode and a photocell circuit. On the end of the motor is connected a small disc with a hole near the rim. On the other side of the hole is a photocell. The laser is focused to the hole. As the motor turns, spinning the disc and bobbin, the wire is wrapped around it and the photocell circuit outputs a pulse to a decade counter/7 segment display counter every time the bobbin makes a complete turn and the light from the laser hits the photocell, which forms a voltage divider with a resistor and connects to the base of a standard NPN transistor. This outputs a 'low signal' to a 555 timer wired in a schmitt trigger configuration. This would then output a 'high' signal and that would be sent to a clock of a 4510 and 4511 driving 7 segments *4.
Is this a good design?
Would appreciate any feedback or any advice
At first I considered a mechanical counter but decided it would not be feasible.
I wanted to get someone's opinion on my new idea
I want to use a laser diode and a photocell circuit. On the end of the motor is connected a small disc with a hole near the rim. On the other side of the hole is a photocell. The laser is focused to the hole. As the motor turns, spinning the disc and bobbin, the wire is wrapped around it and the photocell circuit outputs a pulse to a decade counter/7 segment display counter every time the bobbin makes a complete turn and the light from the laser hits the photocell, which forms a voltage divider with a resistor and connects to the base of a standard NPN transistor. This outputs a 'low signal' to a 555 timer wired in a schmitt trigger configuration. This would then output a 'high' signal and that would be sent to a clock of a 4510 and 4511 driving 7 segments *4.
Is this a good design?
Would appreciate any feedback or any advice