spherical-sound-society / OPERA_ROTAS

OPL2 Based Generative Drum Machine
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Unsure about U4 Component #2

Open ColePritchard opened 1 year ago

ColePritchard commented 1 year ago

Hello! I've been slowly putting my Opera Rotas Rev 0.95 together these past few days. I was missing some components, so I had to order them on ebay. I was able to figure almost all of them out, but I got tripped up trying to install U4, which is listed in the schematic as a 4N35 chip? But my socket on the board has 8 slots, and the 4n35 has 6 legs. Is that the wrong chip? Or does it only use 6 of the socket slots? u4 component u4 socket 4n35

spherical-sound-society commented 1 year ago

Im not dead sure, but I think that version was faulty. You probably want to use a 6n137 version wich is a slightly different circuit.

Mail me at: @.*** asking me for the correct circuit. I will search it in my computer

El sáb, 21 ene 2023 a las 23:30, Cole Pritchard @.***>) escribió:

Hello! I've been slowly putting my Opera Rotas Rev 0.95 together these past few days. I was missing some components, so I had to order them on ebay. I was able to figure almost all of them out, but I got tripped up trying to install U4, which is listed in the schematic as a 4N35 chip? But my socket on the board has 8 slots, and the 4n35 has 6 legs. Is that the wrong chip? Or does it only use 6 of the socket slots? [image: u4 component] https://user-images.githubusercontent.com/8784215/213889493-40938f11-ccc0-4abf-8fe7-bfa2819bc4ac.PNG [image: u4 socket] https://user-images.githubusercontent.com/8784215/213889494-36ce73fc-5916-4e95-96ee-8eab4fbf9b0e.PNG

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ColePritchard commented 1 year ago

Ok thanks for the info! also I think github hid your email. I think you can attach files to these comments?

spherical-sound-society commented 1 year ago

I think I hide it myself for the spam bots :)

Here you have the working midi part

You will probably want to cut the trace of the midi in that circuit and solder this midi out to the corresponding pin on the bluepill

El dom, 22 ene 2023 a las 5:13, Cole Pritchard @.***>) escribió:

Ok thanks for the info! also I think github hid your email. I think you can attach files to these comments?

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ColePritchard commented 1 year ago

I'm not sure I follow? Is the 6n137 the correct chip? or is it the 4n35? Also I'm not sure which traces and pins those are?

spherical-sound-society commented 1 year ago

Hi! The correct is the 6n137

El jue, 26 ene 2023 a las 5:20, Cole Pritchard @.***>) escribió:

I'm not sure I follow? Is the 6n137 the correct chip? or is it the 4n35? Also I'm not sure which traces and pins those are?

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ColePritchard commented 1 year ago

Hey so all my components finally came in, I soldered them in place and powered it on! But only one button seems to work (sw15). Do you have any suggestions for troubleshooting?

spherical-sound-society commented 1 year ago

If its a preseldered PCB, reflow the bluepill. If it´s an older one, reflow the 4053 of the buttons

spherical-sound-society commented 1 year ago

Glad to hear it!

Check the github, I have responded there. I would reflow the bluepill and try again

El vie, 3 feb 2023 a las 0:34, Cole Pritchard @.***>) escribió:

Hey so all my components finally came in, I soldered them in place and powered it on! But only one button seems to work. Do you have any suggestions for troubleshooting?

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spherical-sound-society commented 1 year ago

Its the presoldered or the the older pcb? If its the older, try to reflow the the 4053 muktiplexor that is connected to the buttons

El vie, 3 feb 2023 a las 1:52, Juan Carlos Ureña Costa @.***>) escribió:

Glad to hear it!

Check the github, I have responded there. I would reflow the bluepill and try again

El vie, 3 feb 2023 a las 0:34, Cole Pritchard @.***>) escribió:

Hey so all my components finally came in, I soldered them in place and powered it on! But only one button seems to work. Do you have any suggestions for troubleshooting?

— Reply to this email directly, view it on GitHub https://github.com/spherical-sound-society/OPERA_ROTAS/issues/2#issuecomment-1414512083, or unsubscribe https://github.com/notifications/unsubscribe-auth/ACPQS5AEUISCZGPKZQTLXQLWVRAAJANCNFSM6AAAAAAUCUAG3A . You are receiving this because you commented.Message ID: @.***>

ColePritchard commented 1 year ago

The pcb was not presoldered. Also what component is the 4035? I don't see that on the schematic. There's the 4n35, but that was replaced with the 6n137

spherical-sound-society commented 1 year ago

The 4n35 never worked. The 6n137 works perfect. The chip that you have to reflow too is the CD4053. It´s the multiplexor that connects all the buttons with the bluepill

El vie, 3 feb 2023 a las 3:10, Cole Pritchard @.***>) escribió:

The pcb was not presoldered. Also what component is the 4035? I don't see that on the schematic. There's the 4n35, but that was replaced with the 6n137

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