So out of curiosity, I connected my scope to a PWM output from an Arduino and I pulsed it at max value for a duration of 100ms on and 300ms off ... here is the output
What intrigues me about this is how noisy it is ... there is no load, the leads are connected directly to ground and the PWM pin.
Next, I used this circuit
and ran the same exact pulse to the gate. Here is the signal at the gate:
and here is the signal at the cathode from ground ... im posting two because I thought it was interesting how much the frequency jumped around:
Is this circuit noisy because of my power supply? Or what? And why does the frequency jump around so much when I have a load on it?
(Images also uploaded into the thread for STJ
What intrigues me about this is how noisy it is ... there is no load, the leads are connected directly to ground and the PWM pin.
Next, I used this circuit
and ran the same exact pulse to the gate. Here is the signal at the gate:
and here is the signal at the cathode from ground ... im posting two because I thought it was interesting how much the frequency jumped around:
Is this circuit noisy because of my power supply? Or what? And why does the frequency jump around so much when I have a load on it?
(Images also uploaded into the thread for STJ
Comment