hackware
New Member
I'm just starting back designing with the 555 again, after a few years away from silicon valley...
I need 3 (4?) timing functions, so a 558 seems like a good fit, if they can live with the reduced pins available to each timer.
Functions needed:
1) variable speed oscillator
2) variable pulse width monostable (triggered by oscillator)
3) variable voltage output (another monostable gating oscillator pulses to voltage accumulator circuit)
4?) variable oscillator duty cycle.
What I'm building is a fish zapper to get rid of some giant catfish in my father's pond. They are killing off all the other fish.
(and YES, it is legal in Mississippi if done on your own property)
Anyway, to get the signal to match the water (must be tuned because it's a pond, not running water), I need to vary frequency, pulse width,
and amplitude.
(borrowed a couple of the cheap fish zappers, but they could not be adjusted for my water conditions, and the commercial rigs cost many
hundreds of dollars...)
This signal will trigger a car battery/ignition coil circuit driven by a pair of 3055 transistors.
I'm gonna build a test circuit with individual 555 chips, but want to use a single 556 or 558 chip if possible...
Any assistance and/or ideas would be great...
william...
I need 3 (4?) timing functions, so a 558 seems like a good fit, if they can live with the reduced pins available to each timer.
Functions needed:
1) variable speed oscillator
2) variable pulse width monostable (triggered by oscillator)
3) variable voltage output (another monostable gating oscillator pulses to voltage accumulator circuit)
4?) variable oscillator duty cycle.
What I'm building is a fish zapper to get rid of some giant catfish in my father's pond. They are killing off all the other fish.
(and YES, it is legal in Mississippi if done on your own property)
Anyway, to get the signal to match the water (must be tuned because it's a pond, not running water), I need to vary frequency, pulse width,
and amplitude.
(borrowed a couple of the cheap fish zappers, but they could not be adjusted for my water conditions, and the commercial rigs cost many
hundreds of dollars...)
This signal will trigger a car battery/ignition coil circuit driven by a pair of 3055 transistors.
I'm gonna build a test circuit with individual 555 chips, but want to use a single 556 or 558 chip if possible...
Any assistance and/or ideas would be great...
william...