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by frank00
Fri Feb 20, 2015 8:39 pm
Forum: Introduction to Digital Electronics
Topic: Voltage source to LED when switch not activated
Replies: 2
Views: 11670

Re: Voltage source to LED when switch not activated

When both switches are OFF, i.e. S=0 and R=0, the circuit latches the previous state of the outputs. For example, when SR=01, QQ' = 01 or when SR=10, QQ'=10 (refer to the characteristic table). Therefore when setting SR=00, the circuit output is either 01 or 10. As for where does the power comes fro...
by frank00
Fri Feb 20, 2015 5:41 pm
Forum: Projects
Topic: Arduino Tachometer
Replies: 2
Views: 12041

Re: Arduino Tachometer

Hello Admin, I would be very grateful to you if you could reply to the above post. I am having the same problem. RPM values are very erratic, sometimes large negative values are obtained. RPM value never becomes stable and does not return to zero when rotor blades are removed. I made the circuit exa...

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