I'm working on a 4017 based counter circuit, I have the counter part working fine with transistorized outputs going to LEDS, however I want to use this circuit to activate 555 timer astable circuits for different lengths of time. I have come up with two variations utilizing 555 timer monostable circuits to activate the astable circuits, (see attached files for block diagrams) I know there's some resistors missing, like the pull down resistor on the astable reset and a base resistor on the transistors, but you can get the idea.
I have some questions regarding the points where chip pins are going to the same connections.
Some further explanation of the operation of both circuits may be in order first;
Circuit 1 can activate the monostable for periods shorter than the counter output pulse, as it resets the monostable on the next count. However I don't know if diodes would be required at certain points to separate the chips where they connect to the transistor?
Circuit 2 stops the counter chip when the monostable circuit is activated, thus allowing longer counts than the clock speed going to the 4017. But could more diodes be required here? between the monostable outputs and the 4017? between the astable and monostable too?
Lastly I would like to know if you think the transistor stages would function correctly? They are just acting as switches, which are normally high and go low when activated.
Please ask for clarification if I have missed anything, I think it's all there.
One last note about the diagrams, the circle at the top of the transistor stage would be connected to +V or Vs or whatever you want to call it
I have some questions regarding the points where chip pins are going to the same connections.
Some further explanation of the operation of both circuits may be in order first;
Circuit 1 can activate the monostable for periods shorter than the counter output pulse, as it resets the monostable on the next count. However I don't know if diodes would be required at certain points to separate the chips where they connect to the transistor?
Circuit 2 stops the counter chip when the monostable circuit is activated, thus allowing longer counts than the clock speed going to the 4017. But could more diodes be required here? between the monostable outputs and the 4017? between the astable and monostable too?
Lastly I would like to know if you think the transistor stages would function correctly? They are just acting as switches, which are normally high and go low when activated.
Please ask for clarification if I have missed anything, I think it's all there.
One last note about the diagrams, the circle at the top of the transistor stage would be connected to +V or Vs or whatever you want to call it
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