hello : )
I am trying to design a circuit that will allow me to use the amplitude of a sine wave as a control signal (10khz from a sound card) to control the duty cycle of a PWM generator.
The idea I have so far, is sort of like this:
Sine wave AC (control signal) > full wave rectify to DC > to vary pwm generator duty cycle.
ive done some measurements of the voltages and I've added them to a draft schematic below.
Im not sure what I can do to connect this together to make it work, any ideas would be great, as im a bit stuck.
heres a pic:
In the end I used 1N4148 diodes to rectify the AC signal to DC. (when i took voltage measurments)
thanks for any help : )
UPDATED PICTURE*
cant seem to delete the old attachment below
I am trying to design a circuit that will allow me to use the amplitude of a sine wave as a control signal (10khz from a sound card) to control the duty cycle of a PWM generator.
The idea I have so far, is sort of like this:
Sine wave AC (control signal) > full wave rectify to DC > to vary pwm generator duty cycle.
ive done some measurements of the voltages and I've added them to a draft schematic below.
Im not sure what I can do to connect this together to make it work, any ideas would be great, as im a bit stuck.
heres a pic:
In the end I used 1N4148 diodes to rectify the AC signal to DC. (when i took voltage measurments)
thanks for any help : )
UPDATED PICTURE*
cant seem to delete the old attachment below
Attachments
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