Need A Help in deriving a clock for 4017

MrChips

Joined Oct 2, 2009
25,948
If that is the case, why are you using a CD4017 Johnson counter?

I would have selected a toggle flip-flop using either a D-type or J-K flip-flop such as CD4027.
I would replace the transistor with a hex inverting Schmitt trigger such as CD4584.
 

Thread Starter

Layan_AK

Joined Mar 28, 2017
79
i wanted to use 4027 but i dont have it so i chose 4017 which i have^^
if using 4027 better than 4017 i will take one :)

Also i wanted to use 4093 instead of transistor so which is better 4093 or transistor
also the design need to modify if i replace the counter and the transistor ?

thanks for ur appreciated effort :)
 

AnalogKid

Joined Aug 1, 2013
9,984
Run the signal from the RF receiver through one 4093 gate as an inverter. That output drives pin 3 of U1A. The pushbutton drives pin 2 of U1A. U1A pin 3 drives the 4027 pin 3 directly. Both diodes and R7 are deleted. If the RF receiver output is a relay, add a 10K resistor to GND.

ak
 

Thread Starter

Layan_AK

Joined Mar 28, 2017
79
OK, but there is no need for U1C and U1D. The button input can drive U1A directly.

ak
i know but i used them to ensure that the other two gates' inputs connected ..
I read that it would be better if u don't leave any inputs not connected o_O

why we choose R6 around 220 ohm not 10k as usual :rolleyes:

regards :)
 

MrChips

Joined Oct 2, 2009
25,948
Looks good, except eliminate R1 since we now have a much lower value capacitor on C4, 0.1μF.
D1 can be any switching diode, 1N914, 1N4148.
 

MrChips

Joined Oct 2, 2009
25,948
Looks fine except the photo does not provide a reference scale to tell what gauge wire it is.
Lamp cord is about 18AWG, I think.
 
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