Gravitation Reverb Schematic?

N

Nolen213

New member
I order the Gravitation Reverb pedal, but so far no build instructions or schematic was posted. I was hoping to order parts soon, but can't find anything to tell me what is in the circuit. Even the EQD schematic could get me started. Thanks for any help,
 
R11M
R210K
R31M
R439K
R510K
R622K
R7100K
R822K
R939K
R1010K
R11470R
R12100K
R1310K
R1410K
R151K
R1615K
R10147K
R10247K
C1100n
C21u Film
C31u Film
C410n
C51n
C61u Electrolytic
C71n
C81u Electrolytic
C91u Electrolytic
C10100p
C111u Electrolytic
C12100n
C13100n
C14100u
C15100u
C16100n
C17100n
C100100u
C10110u
D1001N5817
IC1TL072
IC2TL072
IC3BTDR-3H
IC4L78L05
ATMOSPHEREB50K
MIXB10K
DECAYB25K
TONEB25K
LENGTHSPDT ON/ON
 
Last edited by a moderator:
Is the LM78L05 voltage regulator compatible? I can't seem to find any L7805CV in a TO-92. I compared both datasheets, but I am still unsure.
 
Also, is R11 supposed to be 4k7? I just noticed there isn’t anything here that looks like LED protection. I finished this pedal yesterday and it works great, but the LED died a split second after it engaged.
 
Robusto said:
Also, is R11 supposed to be 4k7? I just noticed there isn’t anything here that looks like LED protection. I finished this pedal yesterday and it works great, but the LED died a split second after it engaged.
Click to expand...
Glad you posted this question. I just tested mine before boxing it up and it does the same thing. When active the led indicator “blinks” once and turns off. Hope we get an answer to this soon.

Following the trace on the board it looks like anode of the LED goes straight to the 1n5817 then to V+. Was the LEDR forgotten on this board?

Edit: I think it may have been forgotten, I soldered a 4k7 resistor to the anode of the LED and it works perfectly now. I’ll start a thread in case anyone else has an issue.
 

Attachments

  • 18C2767C-9568-42CD-B394-0234D5801AC0.jpeg
    18C2767C-9568-42CD-B394-0234D5801AC0.jpeg
    343.7 KB · Views: 8
Last edited:

No LEDR in Gravitation?

I was just about to box up the Gravitation pcb when I happened to notice Robusto’s question about an apparent lack of an LEDR. It was mentioned that the LED indicator seemed to blink for a second and then turn off when pedal was activated. I double checked on mine and sure enough, same thing...
forum.pedalpcb.com forum.pedalpcb.com
 
You must log in or register to reply here.
Back
Top