- Posted by Franky on Friday 13 November 2009 - 10:25:31
Stupid question. I already found the answer on Wikipedia. It is indeed resistor R1.
How high should the resistor be?
I would like to use 15V inp...
- Posted by Franky on Friday 13 November 2009 - 10:25:31
Pull up resistors usually aren't critical so you could probably use anything between 10k and 100k.
You might want to have a fairly large resistor...
- Posted by Franky on Friday 13 November 2009 - 10:25:31
Pull up resistors usually aren't critical so you could probably use anything between 10k and 100k.
You might want to have a fairly large resis...
- Posted by Franky on Friday 13 November 2009 - 10:25:31
Yup. That's what I was thinking. I'm not completely sure if the 100k pull down resistor is necessary so could someone else see if it is?
- Posted by Franky on Friday 13 November 2009 - 10:25:31
Depends on what kind of source impedance pin 4 of the 555 requires for noise immunity in this application. Pin-4 is a bias to the base of an interna...
- Posted by Franky on Friday 13 November 2009 - 10:25:31
I hope this is never too late :) invert the signal going to the RESET pin of 555 with a transistor...
just picture this out cuz I have no picture...
- Posted by Franky on Friday 13 November 2009 - 10:25:31
It works! But not according to my specification. It still has a lot of disturbance. I will figure that out later. There is a more important problem. T...
- Posted by Franky on Friday 13 November 2009 - 10:25:31
You might want to have a fairly large resistor go from the non-inverting input to ground so that the voltage doesn't drift anywhere on the other side...
- Posted by Dr. Dark Current on Saturday 17 October 2009 - 18:37:26
What do you think is the source of the interference? The arc itself, or electromagnetic interference from the bridge, or something else?
- Posted by Dr. Dark Current on Saturday 17 October 2009 - 18:37:26
I bet the problem is pickup at the switching frequency feeding back into the audio. I've met this issue while trying to make a Class-D guitar amp, it ...