SOLVED low tide and caesar chorus doesn't modulate
- Thread starter makisushi
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mybud
Well-known member
Thanks for the info.
Night here, so if you don’t mind I’ll get back to you on this in the morning, ok?
mybud
Well-known member
Ok, you’re hearing signal with the pedal engaged, the LFO’s rate is changing as you rotate the pot, the associated LED also confirms these facts, and you’re hearing chorus when you move the appropriate pot as above. Then the LFO circuit is operational. It’s just not reaching the next stage.
Have you tried playing audio through it while adjusting the trimpot?
mybud
Well-known member
Ok, so I suggest double-checking component values around IC1, checking for cold solder joints around it, checking that your 022 is properly seated in the socket, and seeing if this gets the rate LED to flash. This seems to be the problem area AFAIK.
The BBDs’ frequency will be well into the hundreds or millions of Hz, so that’s to be expected.
mybud
Well-known member
Ok granted, but the problem seems to be with the LFO, not the BBDs
mybud
Well-known member
What happens if you take the cathode end to ground, and also are all possible grounds connected when you’re testing the circuit?
ok so, i don't know if that's what you meant but when i wire the cathode of D1 to the ground of the PCB, the led become more bright . If i wire D2 to the PCB ground then the LFO light light up (full on) just like if I short the IC pin 6 & 7.
Please let me believe the BBD will fix it haha . I appreciate your help just spent so much time on theses two...
Please let me believe the BBD will fix it haha . I appreciate your help just spent so much time on theses two...
mybud
Well-known member
I completely understand your frustration. It’s annoying when things don’t work as one has planned.
But FWIW do try grounding all appropriate connections to some sort of common ground. BBDs can be finicky regarding this aspect. I experienced something similar with a BBD-based circuit which only worked once I took this step, hence my advice.
Ok, I’m going to be on the road till early next week but will respond further in due course. Keep at it. We’ll get this working eventually
Just an update because I accidentally deleted the whole post to remove the YouTube video I will now take offline: I think I found the issue with the chorus! there was a pin on the bbd IC that was not properly soldered... I think it was 6 or 7 and that's why when I was shorting theses pin the lfo light would light up. I did not test the pedal with audio yet (because I was building another one) but at least I now have an LFO that is "LFOing" ! I did also reflow the low tide so will give it a try also tomorrow. If that was the issue I will now have a bunch of bbd (on their way) for others projects lol
Just an FYI, in the kindest way possible, please don't delete posts in troubleshooting threads. I get deleting videos. But these serve as a repository of knowledge that occasionally someone with a similar problem may review before posting their own troubleshooting thread.
There's only so much troubleshooting the community can contribute per day and having these old threads can help a lot. At least, if future someone actually uses the search function before banging away on their RGB keyboard.
Hope you got one sorted at least and don't hesitate to start a new thread for the other one.
There's only so much troubleshooting the community can contribute per day and having these old threads can help a lot. At least, if future someone actually uses the search function before banging away on their RGB keyboard.
Hope you got one sorted at least and don't hesitate to start a new thread for the other one.
mybud
Well-known member
That’s good news. Now it remains just to adjust the bias and you should be in business.
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