555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration
555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration
(OP)
This is what I want to do.
Input: sawtooth from 0-8 volts with freq of 30 Hz to 60 Hz
Output: a pulse when input is at a user set voltage between 1-7 volts.
The pulse output is adjustable voltage (3-9v) and duration (5uS to 2mS)
I'm flexible, it is not super critical. I just need a stable trigger even if it has some delay.
If some one can draw out a circuit I would appreciate it.
The 555 timer seems to be the way to go?
Thanks
Input: sawtooth from 0-8 volts with freq of 30 Hz to 60 Hz
Output: a pulse when input is at a user set voltage between 1-7 volts.
The pulse output is adjustable voltage (3-9v) and duration (5uS to 2mS)
I'm flexible, it is not super critical. I just need a stable trigger even if it has some delay.
If some one can draw out a circuit I would appreciate it.
The 555 timer seems to be the way to go?
Thanks





RE: 555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration
Dan - Owner

http://www.Hi-TecDesigns.com
RE: 555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration
RE: 555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration
Then a one-shot to make the pulse. Adjustable duration with another knob.
Then an adjustable voltage divider (potentiometer) to tweak the amplitude.
Be careful with defining your requirements. A sawtooth waveform goes up AND down. So you might get a double pulse, which is fine if that's what you want.
I don't think you can do all this with a single 555, but perhaps there's a clever trick that makes it barely possible. But it's probably easier to just make the straightforward (step by step) version.
All these building blocks are on the Internet.
RE: 555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration
ht
Dig around. There might be something that matches
your application.
<als>
RE: 555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration
Dean Cooper
dclabseng.com