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AC generation

colum

Jul 25, 2013
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I want to use 555 as pulser to a 4000 series IC that will split into 2 alternating pulses
I want to use 4000 ser IC but I lost my diagram and I believe it was a 4011 or 4017.
and then another 4000 ser to boost the output to Transistors
Thanks, Jeff
 

Delta Prime

Jul 29, 2020
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I want to use 4000 ser IC but I lost my diagram and I believe it was a 4011 or 4017
I hate when that happens!
What amplitude?
What frequency do you want?
What is the application?
 
Last edited:

colum

Jul 25, 2013
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I want to drive an old collection of vibration frequency meters , some are lo voltage
and some are 120 v. I already built a stepper motor drive and one line was attached to a Vib meter
so using 4000 ICs does work and the meter is not picky except it takes a while to settle down
after changing Freq. This is just a very old bucket list and will be abandoned afterward
This system is not at all suitable for modern electronics
Thanks.. Jeff
 

Delta Prime

Jul 29, 2020
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I already built a stepper motor drive and one line was attached to a Vib meter
so using 4000 ICs does work and the meter is not picky except it takes a while to settle down
after changing Freq.
I wonder if this description and circuit rings a bell for you.
A 555 timer configured as an astable multivibrator generates a square pulse depending on the values of the timing resistor and timing capacitor. In the second stage, there is a decade counter CD4017. This counts the square pulses that are coming from the timer IC and gives stepping pulse output through four switching transistors.
photo_1701759260970.png

 

colum

Jul 25, 2013
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Thanks Delta Prime
If I were to use only 2 of these outputs to drive a synchronous motor
would it make any difference which 2.
To boost the output power to transistors what ser 4000 would be best
Many thanks for your advice.
Jeff
 

Delta Prime

Jul 29, 2020
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Thanks Delta Prime
If I were to use only 2 of these outputs to drive a synchronous motor
would it make any difference which 2.
To boost the output power to transistors what ser 4000 would be best
Many thanks for your advice.
Jeff
This is the part where I don't completely understand the question.
So for DC I would use a optoisolator and a power mosfet for 120 volts DC.
For AC I would use a optoisolator
Driving a triac for 120 volts AC
And for both I would use a SSR or solid state relay. Does that ring any bells? This is all off the top of my head, theoretical,but I'm sure, if I search I could find a schematic for you. cuz I am using a stupid phone.
Speech to text
 

colum

Jul 25, 2013
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The circuit schematic I lost was the same one that you gave me using a 4017 (thanks)
I used 2 of the 4 outputs and upped the power with another 4000 to transistors
at this time I only want to test lovolt Vib meters and it seems to have worked fine
I now wonder if the sequence of the output of the 4017 causes a delay in that only
2 of the 4 outputs are used.
I have a few 4027 that have 2 outputs but I can't seem to get them to work
and several diagrams that are very different pinouts.
Thank you for your time (I also have a stupid phone)
Jeff
 

colum

Jul 25, 2013
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This is the part where I don't completely understand the question.
So for DC I would use a optoisolator and a power mosfet for 120 volts DC.
For AC I would use a optoisolator
Driving a triac for 120 volts AC
And for both I would use a SSR or solid state relay. Does that ring any bells? This is all off the top of my head, theoretical,but I'm sure, if I search I could find a schematic for you. cuz I am using a stupid phone.
Speech to text
I'm fairly new at posting so I'm going to try
I hope you can read this attempt
I built both of these circuits and they don't work
The wiring on the 4027 has #14 and #15 going going to additional IC and then Transistors
The second circuit has the 4027 #15 going to additional IC
and # 14 going going to #3 of 4027 and then #1 going to additional IC instead of 14 of previous circuit
can this be correct
I'm trying to generate 2 poles for lo volt AC
thanks, colum
 

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Delta Prime

Jul 29, 2020
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What electronic magazine did this come from?
What year?
:) What month?
 

Harald Kapp

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Nov 17, 2011
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I built both of these circuits and they don't work
Too unspecific. What doesn't work, which parts work?
  • is there a clock signal at pin 3 of the 4027?
  • is there a clock withg 1/2 the frequency at the output pin 1 of the 4027?
  • is there a clock with 1/4 the frequency of the clock from pin 3 at the outputs pins 14 and 15 of the 4027?
  • are the clocks at pins 14 and 15 inverse to each other (see image 1 in my post #4)?
  • are these clocks present at the inputs 3,5 and 7 as well as 9, 11 and 14 of the 4049, respectively?
  • are these clcoks present at the outputs 2, 4 and 6 as well a 10, 12 and 15 of the 4049, respectively?
  • is point "A" in the left schematic connected to a power source? What is te voltage at point "A"?
 
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