Submitted by TrystanLea on Fri, 08/07/2009 - 17:12.
Thanks for the screens, Its great to see the program working for you! Nice window theme too!
The waveforms don't look right though. Are they from before or after the spark incident? I have also blown two hcpl's and the output look very similar especially: http://www.flickr.com/photos/41200830@N02/3797316264/in/set-721576219681... were the waveform oscillates erratically as the main sinusoidal waveform crosses zero.
Im wondering if there is a problem with the circuit design that allows a maximum rating to be exceeded some ware...
The reason I say this is that I recently changed my high side power supply from a cheap 5V volt adapter which was actually 6V and so I had to use a 5V 100mA voltage regulator to keep it at 5V, to a computer power supply which gave a clean 5V output. The hcpl's blew soon after and I wonder weather the voltage regulator was acting as some sort of current limiter to the supply...
It could also be possible to add small resistors to the inputs of the hcpl's to limit the input currents
Im away now until Monday, I will have a closer look at it then.
The method you found for frequency measurement looks great, it would be good to try it.
Re: Re: delayMicroseconds in power logger sketch
Thanks for the screens, Its great to see the program working for you! Nice window theme too!
The waveforms don't look right though. Are they from before or after the spark incident? I have also blown two hcpl's and the output look very similar especially: http://www.flickr.com/photos/41200830@N02/3797316264/in/set-721576219681... were the waveform oscillates erratically as the main sinusoidal waveform crosses zero.
Im wondering if there is a problem with the circuit design that allows a maximum rating to be exceeded some ware...
The reason I say this is that I recently changed my high side power supply from a cheap 5V volt adapter which was actually 6V and so I had to use a 5V 100mA voltage regulator to keep it at 5V, to a computer power supply which gave a clean 5V output. The hcpl's blew soon after and I wonder weather the voltage regulator was acting as some sort of current limiter to the supply...
It could also be possible to add small resistors to the inputs of the hcpl's to limit the input currents
Im away now until Monday, I will have a closer look at it then.
The method you found for frequency measurement looks great, it would be good to try it.
Thanks
Trystan