I have it connected to a Kam laser that has DMX to control the patterns. It uses 9 channels. The laser is set to DMX channel 1, which I presume uses the first 9 channels.
When connected to my PC and I open DMX Demo software, the LED flashes, so it must be receiving the signal from the PC. But nothing happens, sliding the controllers does not have any effect on the laser. I also tried putting the battery in the unit and using the test button, nothing happens.
I don’t have any other DMX lighting to test it with, is there any other way of making sure it is working, what about a multi-meter across the DMX output?
I’m really stuck on this and would appreciate any help.
Further to the above, I have put a meter across pins 1&2 and 1&3.
With the software set to 16 channels and all at zero I’m getting 0.83v on pin 2, and 3.99v on pin 3. With all sliders set to 255 I get 0.72v on 2 and 4.15v on 3.
Could you provide a link to the manual of the laser you are using - I’m interested to see the specs.
BTW: Have you checked you get the same signal out from the laser’s DMX OUT connector you feed to the input connector.
I’ll try and find the manual for the laser online.
Regarding the K8062 unit, I noticed when it’s plugged into a USB port and without the software running, I am getting around 4 volts out of connectors 1& 3, and around 0.50 volts from 1 & 2. Is that normal? Only the power LED is lit.
Also I found this by searching the forum -
[color=#FF0000]When I power it up in test mode, I get a power light and the DMX signal light flashes twice then stops. Pressing the test button again starts the DMX signal LED flashing. The flashes get longer the more the test button is pressed.
All seems ok so far.
But it just won’t control any fixtures at all
I’ve measured the voltage at the output from the board and just get a constant voltage between all pins. I was expecting a variable signal. Is this correct?
Voltage results are as follows (the constant voltage changes with the number of test button presses) :-
No of presses : pins 1 and 2 : pins 1 and 3
0 : 3.55 : 1.34
10 : 2.93 : 1.97
50 : 2.62 : 2.29
100 : 2.62 : 2.29[/color]
Running my unit in test mode I get different results.
Nothing lights up when I connect the power, above it says the led flashes twice (mine only does this when connected to a USB port, not in test mode with the battery). It lights up only when I press the button, then with one press I get 0.58 volts between 1&2, but this quickly jumps up to 1.86 volts (in less than one second) and stays steady. A second press gives 1.74 volts on 1&2. 10 clicks on the button gets me 1.76v on 1&2.
At zero clicks I get nothing, above it says 3.55v for zero clicks.
[quote]Regarding the K8062 unit, I noticed when it’s plugged into a USB port and without the software running, I am getting around 4 volts out of connectors 1& 3, and around 0.50 volts from 1 & 2. Is that normal? Only the power LED is lit.[/quote]Yes, this is normal. I got from 1&3 4.25V and 1&2 0.67V and power LED lit.
The values and the description of the operation you found from this forum are for the old firmware of the K8062.
The voltage values you got seem to be OK.
I got between pins 1&2 1.97V when stabilized after about 1 second and 1.69V after pressing the button 10 times.
The test mode starts when battery is fitted and the button is pressed once. The unit should not be connected to the PC.
The test mode terminates by pressing the button > 10 seconds.
I’m having a similar problem… this kit did work for a couple of minutes, but then no longer controls the lights. I’m wondering which component has gone faulty…
Either connected to the computer or in test mode, the LEDs flash as they should… a voltmeter across pins 2 and 3 seem to show some voltage changes… I even tried a different DMX device that displays an LED when receives DMX data… nothing…
I checked the soldering over and over… nothing wrong there…
Could anyone suggest a component that I could try replace? could it be the PIC?
You may test the K8062 operation by running the program DMX_demo.exe.
The DMX signal LED should start flashing when the program is run (as seems to be the case).
Next you can check the voltages on the DMX output connector:
Between terminals 1 and 2 there should be about 0.8V and between terminals 1 and 3 there should be about 4.1V.
Then adjust all the eight DMX Value sliders to max position.
Now there should be between terminals 1 and 2 about 0.7V and between terminals 1 and 3 there should be about 4.2V.
The most important is to see that the voltage changes a little when the sliders are moved to max position.
