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+---- Thread: Clock Output (/showthread.php?tid=206)
RE: Clock Output - userfriendly - 05-27-2019
(05-27-2019, 07:39 PM)XORadmin Wrote:(05-27-2019, 07:14 PM)userfriendly Wrote: Hello!
I have been trying to use the clock out to my ER-101 (clock threshold 2.5). It doesn't seem to work though. Using a multimeter I tested the (running) clock out. Even at slow BPM (70) the multimeter is jumping around from .99 to 1.5 or 1.8. In calibration mode the clock out measures 2.55.
Sorry I am not very smart with this stuff! I just wanted to say that I am also having trouble clocking the ER-101!
You can't measure with a running clock. Even 70 BPM is too fast for a multimeter. Stopped clock and cursor on 'CLOCK OUT-IN 5'.
Maybe you measure also for the reset output the same way, just to compare.
Oh okay! thank you. I didn't know.
Stopped Clock and cursor on 'CLOCK OUT-IN 5' = 2.55
Reset= 4.97
Clock out at 001BPM =2.55
RE: Clock Output - XORadmin - 05-28-2019
(05-27-2019, 10:48 PM)userfriendly Wrote:(05-27-2019, 07:39 PM)XORadmin Wrote:(05-27-2019, 07:14 PM)userfriendly Wrote: Hello!
I have been trying to use the clock out to my ER-101 (clock threshold 2.5). It doesn't seem to work though. Using a multimeter I tested the (running) clock out. Even at slow BPM (70) the multimeter is jumping around from .99 to 1.5 or 1.8. In calibration mode the clock out measures 2.55.
Sorry I am not very smart with this stuff! I just wanted to say that I am also having trouble clocking the ER-101!
You can't measure with a running clock. Even 70 BPM is too fast for a multimeter. Stopped clock and cursor on 'CLOCK OUT-IN 5'.
Maybe you measure also for the reset output the same way, just to compare.
Oh okay! thank you. I didn't know.
Stopped Clock and cursor on 'CLOCK OUT-IN 5' = 2.55
Reset= 4.97
Clock out at 001BPM =2.55
I think something is wrong here. I just measured NerdSEQ from 3 different batches and all of them show 4.7 volt, which is around the 5 volt i am expecting. With a connected input the voltage stays the same, so they are no weak outputs as it was mentioned.
Indeed, if the clock is running i get an average of 2.5 volt, also as expected. The voltmeter of the O'tool is not too accurate and uses average voltages anyway, so if the clock would be running it would show around 2.5 volt while the top would be around 4.7 volt and the bottom 0 volt.
Just another question: Is the LED flashing (or on when stopped in calibration) with normal intensity? Because that one is directly tied to the line and if the voltage would be 2.5 volt, then you could barely see the LED.
RE: Clock Output - lohacker - 05-28-2019
Checking my CLOCK OUT-IN 5 value with stopped clock and nothing patched gives me "ERR". Is it an hardware problem then?
RE: Clock Output - XORadmin - 05-28-2019
(05-28-2019, 10:32 AM)lohacker Wrote: Checking my CLOCK OUT-IN 5 value with stopped clock and nothing patched gives me "ERR". Is it an hardware problem then?
No thats fine. Because it doesn't measure anything if nothing is connected. Normally you connect the clock output with the clock input and if both are fine the err will be removed.
RE: Clock Output - lohacker - 05-28-2019
(05-28-2019, 10:34 AM)XORadmin Wrote:(05-28-2019, 10:32 AM)lohacker Wrote: Checking my CLOCK OUT-IN 5 value with stopped clock and nothing patched gives me "ERR". Is it an hardware problem then?
No thats fine. Because it doesn't measure anything if nothing is connected. Normally you connect the clock output with the clock input and if both are fine the err will be removed.
Ok thanks I didn't know that, I'll try later and report back.
RE: Clock Output - userfriendly - 05-28-2019
Hello! Here I made a video showing some of my tests. I'm sorry if any of this is incorrect or does not help. I am far far far from any sort of electrical engineer. But I thought it might help!
https://www.youtube.com/watch?v=EG_WmgxooGk&feature=youtu.be
RE: Clock Output - XORadmin - 05-29-2019
(05-28-2019, 11:33 PM)userfriendly Wrote: Hello! Here I made a video showing some of my tests. I'm sorry if any of this is incorrect or does not help. I am far far far from any sort of electrical engineer. But I thought it might help!
https://www.youtube.com/watch?v=EG_WmgxooGk&feature=youtu.be
Hey thanks for the video. You do everything exactly correct! Sorry for me digging into it to be sure it is measured correctly.
And in fact it seems to me that your clock output is not good.
Is it possible to make 1-2 more measurings for me so i can see if there is an issue with the opamp or if there is a wrong resistor placed?
Also, please contact me directly through email so we can figure out how i can fix your problem the easiest. (I don't know who is behind the usernames here)
RE: Clock Output - GBRL - 05-29-2019
(05-25-2019, 08:07 PM)XORadmin Wrote:(05-25-2019, 07:55 PM)GBRL Wrote: Hi Thomas,
it seems, that clock output of my NerdSeq has only 2,5V (Firmware 1.19). I've noticed it two days ago only because of Shakmat Modular - White Gallop, it doesnt't work with clock output of NerdSeq, all other modules are fine with it. I've measured the output with Dave Jones O'tool and it shows around 2,5V (I've compared with trigger out and there is around 5V). If I amplify the clock output just a bit, to around 2.7V, White Gallop is starting run. I have workaround for now and send the clock from Euclidean Circles, but at the beginning of this thread and in manual it says, that clock output should be around 5V. Is it something wrong with my unit or may be with current firmware? Or with me?
Thank you!
It should be around 5 volt and the voltage can't be changed by firmware.
Just some things to check:
What's the voltage with the White Gallop and without the White Gallop? If it is fine without and breaks down with the WG, then the input of the WG is the problem. If it is already low (like less than 4,5 volt) without anything connected then it might be a bad output. And if, is the LED still working normally?
Hi and sorry for late responding, I see there was a lot going on here.
The NerdSeq clock output LED looks fine.
Here is a picture of how I measure it with O'Tool:
https://www.dropbox.com/s/t8r40deea7i1klc/NerdSeq_ClockOut.jpg
Track 1 (on top) is direkt clock output from Euclidean Circles - around 5v
Track 2 is direkt clock output from NerdSeq - just above 2v
But regardless of the measurement, White Gallop is working fine with the first one and with NerdSeq clock output working only after amplifying the clock signal., so it should be a problem with the unit.
I will also contact you directly via email.
RE: Clock Output - XORadmin - 06-03-2019
Just FYI: It turns out to be a bad OPamp which is responsible for the clock issues.
RE: Clock Output - jtomaszb - 08-16-2023
Hi there,
I’ve confirmed that my unit also shows a clock output level of 2.5V via an external oscilloscope. I saw that you previously mentioned this is due to a bad op amp. Is this something that I can send in to get replaced? Or if not, could you specify the part number and location so that I can do the replacement myself. Thanks!