Recent content by Robert Waller

Thanks for explaining your suggestion a bit more.

AAH, You guys have convinced me. I will definitely put on the gate resistors. I just need to determine the correct value. Besides, they are about a penny each in the 0603 format. We have been getting very stable outputs but that's been using a logic analyzer and not a scope to view the...

You got the answer. We are using two pair of twisted wire to pass the data to the controller. The first have of the channels is on the first pair and the second half is on the second pair. The firmware on the PIC reads data from both pair of wires and pulls the channels that it needs. We are...

We will be using the TLC5947 in 12-bit mode and we will use the built in 4Mz clock so the PWM rate at the output pins / gate has to be less than 1KHz. This doesn't factor into the equation but we're also using logic level FETs that are only rated at 220 ma max. We only need about 80 - 100 ma...

David_AVD, Again, thanks for the feedback. The data sheet suggests using a 100 uf on the output to reduce ripple but there are no stated requirements. I will check things as we go. I'll put a scope on it and see what the ringing looks like. I did not know this would be an issue, so...

David_AVD, Thanks for the feedback on our DC Controller. I must confess that I'm the guilty party regarding our schematic and I screwed up a number of items. You're right I did put the FETs in backwards. Again, thanks for the catch. Second, when I transferred my sketch to the drawing I...

Thanks for the welcome. Looking forward to a fun time.

Howdy y'all, I'm from Rowlett, Texas, a suburb of Dallas. I'm looking forward to my second year of Christmas light sequencing. I'm also looking to broaden my experiences from the plain and ordinary to something a little more special. I also believe that this is one of the places to learn...