Electrical Engineering Asked by somerandomusername on October 5, 2020
I am following this VCO design I found from a tutorial and for some reason the frequency is way too low. It doesn’t state in the design what it should be, but following these instructions it is just couple of Hz. I replaced C1 with 0.01u capacitor and now it is better (30-370Hz), but still that doesn’t seem correct. I tried messing around with some of the resistance values, but only managed to change the duty cycles. Is it a problem with the design or am I doing something wrong?
Updated version of my schematic:
You built it well and measured the frequencies accurately. The value of C1 was originally probably 1nF. The signal is a bit asymmetric because the 57k resistors were originally probably 51k. 57k is not a standard value.
I suggest adding 4 more resistors to make the amplitude of the rectangle and the triangle the same.
With C1=1nF, the frequency can be set in the range of 200Hz ... 5kHz.
Correct answer by csabahu on October 5, 2020
1 Asked on December 19, 2020 by michael-reilly
1 Asked on December 18, 2020 by srikrishna-jana
2 Asked on December 18, 2020 by edwin-vargas
2 Asked on December 18, 2020 by dragos-spiridon
1 Asked on December 18, 2020 by tioneb
1 Asked on December 18, 2020 by cdevelop
4 Asked on December 18, 2020 by dean
2 Asked on December 17, 2020 by cremus
1 Asked on December 17, 2020 by runo
2 Asked on December 16, 2020 by bud
brushless dc motor efficiency electrical motor controller power measurement
0 Asked on December 15, 2020 by voltsandnuts
2 Asked on December 15, 2020 by ttbulaski
1 Asked on December 15, 2020 by ninjagreg
0 Asked on December 14, 2020 by amit-nikhade
1 Asked on December 14, 2020 by yonatan-avhar
2 Asked on December 14, 2020 by uk25
3 Asked on December 13, 2020 by nchaud
Get help from others!
Recent Questions
Recent Answers
© 2023 AnswerBun.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP