Multisim and Ultiboard

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CD4020

Hello everyone, 

 

I am trying to get different outputs from a 14 stage binary counter. I am using for reset a 100nF capacitor connected to ground and for clock an oscillator made of 2 nand gates. The counter that I am using is 4020BD_5V. 

 

I used a probe to check the input from the clock (which varies between  0 and 5V) and a probe to check the output at the first pin. Why is the output always 0V?

 

Thank you so much

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Hi Patricia25,

 

 

... I am using for reset a 100nF capacitor connected to ground ... The counter that I am using is 4020BD_5V.

The RESET input of CD4020 (4020BD) is active high not active low. Try connecting the capacitor from RESET to +5 V (Vdd). Don't forget the resistor (1 kΩ to 10 kΩ) from RESET to Vss (ground).

 

 

Best regards,
G. Goodwin

 

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