SparkFun Forums

[birdtrick]

Hi all,

I just built a simple servo tester and have it working properly, but I have a few questions. I was contemplating the three attached circuit designs, and ended up going with the third one since it is the simplest. I didn't use the second capacitor off pin 5, or the transistor. So my first question is if there is any reason I need either one. I am not driving a servo, and simply need to generate a PWM signal.

I tested different input voltages ranging from 5-7V and ended up with slightly different pulse width values. I was surprised by this since a commercial servo tester uses a range of input voltages. Should the pulse width change with varying input voltage?

Please pardon my ignorance.

Thanks for any guidance,

Troy

1.jpg

2.jpg

3.jpg

[232nate]

I know I'm not answering your question but, what program are you using to create the wiring diagrams???

[birdtrick]

I found these wiring diagrams online.

[232nate]

Oh

[lucy albert]

Is there any way to illustrate these diagrams in a 3D model to make it more easy to understandable....any idea?
poikilothermiahyperthymesiadorsalgia