Your Source for DIY Pedal PCBs and NostalgiTone! › GuitarPCB Forum › GuitarPCB Build Support › Apollo tremolo as well
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Anonymous.
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December 10, 2020 at 6:42 pm #16155
Anonymous
InactiveHello, my name is Martin, I am from Germany.
I just finished building the Apollo Trem, and I like it so far. I have an issues though: the led is constantly on; i was under the impression, it should “blink” or “flash” to show the speed?
I used a standard footswitch with Your 3PDT Wiring Board v5, and a bicolor led, which does everything it should except blinking…
Any idea what went wrong?
I appreciate Your help,
best regards,
Martin
December 10, 2020 at 8:05 pm #16156
CybercowParticipantMartin – we’d need to see some good clear photos of the build and details of the wiring so we can determine which mods have been applied. The different LEDs do different things depending on how they’re wired. The “Rate” indicator LED must be connected in a specific polarity orientation to function while the pedal is engaged. I’m guessing you’re referring to D1 which can be either a 3-pin dual color LED or a 2-pin standard LED – but it MUST connected correct to indicate rate when engaged.
December 10, 2020 at 10:44 pm #16157Anonymous
InactiveHello Cybercow,
thank you for your quick answer.
Unfortunately I don´t own a camera, so photos will take some time, though I think I found a solution, I´m not sure if it is the proper way to do it.
Here is what I did:
As I said, I had the footswitch soldered to your 3PDT wiring board v5; the LED (yes, D1, sorry) is a bicolor LED and is connected to the D1 pad on the 3PDT board, wich was connected to the GND and 9V pad in the bottom left corner of the Apollo board (the ones under C1,R1,R2). The LED did everything it should (red when power, green when engaged) except blinking with the rate, it was just on.
So, after looking at the schematics and thinking a bit, I disconnected the 9V wire from the pad under R2 on the Apollo board, and connected it to S5 on the Apollo. The LED stays connected to the 3PDT board, and now it blinks the rate.
Although now it blinks wether the pedal is engaged or not (red blinking whith power, green blinking when tremolo is on). I think i will change the LED to a standard one, so that I have only light when the effect is on (which i prefer anyway).
Does my solution make sense, or can I do damage to something? Is there a better way to do it?Thank you for your patience,
best regards,Martin
December 11, 2020 at 3:52 am #16159
BarryKeymasterIt is supposed to blink when it is off so you can visually see the RATE flashing before engaging the pedal. This way you will know the time without having to engage the pedal for everybody else to hear.
December 11, 2020 at 4:02 am #16160
BarryKeymasterThe LED is supposed to be active so you can see the RATE before engaging it.
December 11, 2020 at 6:39 am #16163Anonymous
InactiveBarry,
thanks for your answer.I rather not have a Led blinking at all times (that makes me nervous);
I´ll meet a friend later to take some pictures, to make my intended wiring more clear.best regards,
Martin
December 11, 2020 at 8:06 am #16165Anonymous
InactiveHi Guys,
I´m back from the photo shoot, that went real quick, here we go:

The first picture shows everything is as it was initially: 3PTB Board connected to lower left on Apollo board, bicolor LED does bicolor, but no blinking.

The second picture shows the new wiring: original 9V disconnected, 3PTB Board now connected to S5. LED does bicolor and shows the rate, but blinking is always happening, wether effect is engaged or not; this is planned, like Barry described above.

This last photo shows the bicolor LED replaced by a standard one; this one blinks only, when tremolo is engaged and there is no light for “power only, no effect”. This is a version I really like.
Now I would like to know, if my wiring is ok (especially the connection S5 on the Apollo board to 9V on the 3PTB board)?
Or does this any damage to anything (components, sound, do I shorten something etc)?
Any suggestions are welcome.
Thanks for your time,
best regards,
Martin
December 12, 2020 at 2:14 pm #16196Anonymous
GuestWhat about the sound? Do you have proper tremolo effect when engaged and clean sound when disengaged? If so, you have succeeded!
December 12, 2020 at 5:15 pm #16199Anonymous
InactiveHello Wilkie1,
yes, I have all I want 😉
My question was probably not very clear. As my knowledge of all things electronic is close to zero, I was worried that my somewhat experimental wiring might cause some kind of hum loop, or have any other kind of undesired effect on the parts used (again, I don´t know nothing about electronics).
I guess my worries are needless?
Martin
December 13, 2020 at 2:38 pm #16206Anonymous
GuestNever fear! Barry is here! All of us at GPCB are here to help you if you run into trouble. AS Cybercow sez, “Just build, build , build!”
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