Hi guys.
I seem to be having issues with simulating a 555 in astable mode on multi-sim 13. I need a period of approximately 1 second.
I used f = 1.44/(R1+2R2)(C)
Duty cycle is approx. 53%.
This circuit is just a rough first attempt and resistor and cap values will be tweeked later to more common values.
However when I simulated this circuit the scope displayed a straight line function which has left me quite puzzled. Since then I've checked my connections and calculations several times and as well as built the simulation circuit from scratch about 3 more times but it doesn't seem to change anything!
any suggestions??
//2 attachments are the circuit and the scope reading.
I seem to be having issues with simulating a 555 in astable mode on multi-sim 13. I need a period of approximately 1 second.
I used f = 1.44/(R1+2R2)(C)
Duty cycle is approx. 53%.
This circuit is just a rough first attempt and resistor and cap values will be tweeked later to more common values.
However when I simulated this circuit the scope displayed a straight line function which has left me quite puzzled. Since then I've checked my connections and calculations several times and as well as built the simulation circuit from scratch about 3 more times but it doesn't seem to change anything!
any suggestions??
//2 attachments are the circuit and the scope reading.
Attachments
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