Hardware > Bobcat DMX Servo Controller
First Bobcat Build - Need updated manual
mkozik1:
You are not allowed to view links.
Register or LoginA few things to check:
Do you have the jumper on the left side of the board in the WIRED position?
Is the DMX cable plugged into the left (DMX IN) jack?
Using a meter, check for 3.3v between pins 2 (positive) and 3 (ground) if the programming header? Pin 1 is the left one, closest to the PIC.
I will have to check the code, but I think the LEDs are error (red) and data (green)
/mike
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Mike, I checked for 3.3v at the header and it is not there. I have voltage coming into the board and at the servo pins but not at the header.
n1ist:
Following the schematic (it's in the WIKI), power comes in at the power connector, goes thru the single supply jumper, diode D1, and the LD1117 regulator. From there, the 3.3v is distributed around the board.
Using your meter, check the middle and right lead of the regulator. The middle (and metal tab) is the 3.3v output and the right lead (when looking at it with the leads down and the writing visible) should be your supply voltage less about 0.4V due to the diode.
If pin 3 shows no voltage, check the single supply jumper and D1 - if D1 is in backwards, it will block the power. You can jumper around D1 to check; it's job is to protect the board if you hook power up backwards.
If pin 3 shows voltage but pin 2 doesn't, it's either a bad regulator or 3.3v is shorted to ground somewhere on the board.
/mike
mkozik1:
OK - I have 3.3 on one pin and supply voltage on the other. I have 3.3v at the ICSP header on pins 1 and 2. I have reflashed the PIC, I have jumpers set to: Run, Wired, Terminate, and Single Supply. Supply in wired in at L+. I have supply voltage on pins 2 and 3 of the servo header. I checked for voltage on both sides of D1 and it is present. I have programmed the board using the Servo Config tool from the WIKI. I am connected into the left RJ45 which is DMX In. I am looping off of an LE to verify DMX out as they both have the same start channel. Nothing is happening on the Servo Board. No lights, the servo hiccups every so often when I run the program (just fade up and dn to get some sort of reaction) The servo works cause I tried it on an SSC-32 I already had.
What am I doing wrong???? All my other boards are working fine!!
Thanks in advance
tbone321:
It sounds like some pictures may be required.
mkozik1:
You are not allowed to view links.
Register or LoginIt sounds like some pictures may be required.
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Here you are - Thanks for looking!
** Also noted on this build is that the regulator that came with this build is a LD33CV rather than the LD1117 that is shown on the Mouser list and the schematic. Does that make a difference? I AM outputting 3.3v from that unit.
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