[Project Help (making a clock from 4 switches)]

please have a look at this circuit,

i want this circuit to create a clock pulse every time any of the switch toggle
but the problem is that the clock pulse is generating after two toggles, i have connected a monostable vibrator to create a clock pulse and input it into the three bit counter's clock but the counter is not counting correctly, when i start simulation the first state of the counter is 000 if then i toggle any of the switch the counter remains 000 when the second time i toggle any switch the counter become 011 :(

it should be like this,
the first toggle must change the counter state from 000 to 001, the second toggle must change the counter state from 001 to 010 .....but this is not happening :S

please help me out of it!!



The circuit and multisim file is attahced

Design1.rar

[just 0 and 1 in 7 segment]

Hello,
I have designed this circuit but i want to modify something in this project,

I want the circuit to display the input binaries as well when a user input through buttons.
can you please give me the idea of doing this ?
should i connect 4x Seven segments with the four inputs with proper arrangements (applying logics to the 7 segment for the 0,1 inputs) ??? please help

www.allaboutcircuits.com/vol_6/chpt_7/7.html

[what is the purpose of Up/Down Digital Counter]

Hello Everyone,

please have a look at this circuit,

http://www.doctronics.co.uk/4510.htm

and tell me what it actually do ?

[which resistors are used in stopwatch circuit?]

thankyou...i have understand

[which resistors are used in stopwatch circuit?]

ok i have found out the resistor values but what about the ICs ?

[which resistors are used in stopwatch circuit?]

Hello Everyone,

can anyone please tell me which resistors have used in this circuit ??

http://www.electronics-lab.com/projects/oscillators_timers/001/index.html