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alf45tar / PedalinoMini

Wireless and Bluetooth MIDI Foot Controller
GNU General Public License v3.0
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Probably a stupid question about the switches #144

Closed davidin73 closed 3 years ago

davidin73 commented 4 years ago

Hi to all of you! Just a noob question: I'm trying to simulate a 2 pedalboard following the schematic, and the second switch does nothing. I have tried and retried, and the only solution was to do a dual single pushbuttons schema. Where i'm failing? My goal is to build a 8 switches pedalboard + 1 external exp pedal,but I'm failing something. Can someone help by giving my a sketch of a 8 pedals schematic? Thank you very much!

alf45tar commented 4 years ago

Connect the 1st button to D1 and the 2nd button to A1. Configure pedal 1 as Momentary 2. Connect the 3rd button to D2 and the 4th button to A2. Configure pedal 2 as Momentary 2. Connect the 5th button to D3 and the 6th button to A3. Configure pedal 3 as Momentary 2. Connect the 7th button to D4 and the 8th button to A4. Configure pedal 4 as Momentary 2.

Connect D5, A5 and GND to a TRS jack as indicated into the schematic. Configure pedal 5 as Analog.

davidin73 commented 4 years ago

Thanks for your answer. But,I must put on all the 'a' pins a 220ohms resistance, or simply I put them serially,the one after the second?😅

alf45tar commented 4 years ago

The pullup resistor should be 10k. 5k is ok too.

davidin73 commented 4 years ago

Ops,yes, 10k,failed to write. I put them in parallel,right? Because I have put them as in the schematics (parallel) of the boss fs6 and nothing is happened... My board is a DOIT ESP32 DEVKIT-V1

alf45tar commented 4 years ago

It is not in parallel. It is a pullup resistor connected dato Vcc 3.3V.

davidin73 commented 4 years ago

Yes,I'm referring to the switches connection,apart the 'ring' resistor part. I have seen now a video about the definition of a pull up and pull down resistor. Excuse me, I have really some veeeery basic about electronics And software. I'm trying to do this beautiful project because I think the most of the commercial projects costs too much for the used technology and have some strong limitations, that your project haven't. Thanks for your patience.

marcochoin commented 4 years ago

Hi, beginner here, I still don’t understand the wiring of the foot switches. In the specs, it says you can use up to 36 switches but I have no clue how to do it. Anyway, you responded sw1 on a1 and sw2 on d1 and etc. On the schematics, it seems to say 1 pin on a1, one on d1 and one on grd for one sw. I want to use a stomp foot switch and those I found have 9 pin. Any help on the wiring would be appreciated. I searched a lot but still don’t understand unfortunately.

alf45tar commented 4 years ago

PedalinoMini has 6 ports for pedals. If you connect to each port a "momentary 1" foot switch (like to Boss FS-5U) you can have 6 switches. Using 6 "momentary 2" foot switches (like the Boss FS-6) you can have 12 switches. Using 6 "momentary 3" foot switches (like the Digitech FS3X) you can have 18 switches. Using 6 "voltage ladder" foot switches (like TC-Helicon Switch 6 ) you can connect 36 switches.

If you don't want to use TRS ports you can replicate the wiring of each port without using TRS connectors.

marcochoin commented 4 years ago

Thanks for that, I "think" I understand what you are saying. I want to use 3pdt foot switches. How many can I use and what type of wiring do I follow ?

Thanks.

alf45tar commented 4 years ago

A 3PDT “3 Poles Double Through” is a "momentary 1" switch with 3 separate poles switched together.

There are actually 3 switches in the same box, each of these switches has a midpoint and a flip-flop. This switch will go up or down depending on how many times you press the switch. Thus a contact is made with the pins middle + top OR middle + bottom.

The central pins are either connected to the lower pins or to the upper pins. The footswitch is pressed to toggle the switches.

marcochoin commented 4 years ago

Thanks for that,

You say it's like a "momentary 1" switch. Can I add multiple switches on the same port like in the "momentary 3" schema if I wire them correctly?

Thanks.

On Sun, Oct 18, 2020 at 4:21 AM alf45tar notifications@github.com wrote:

A 3PDT “3 Poles Double Through” is a "momentary 1" switch with 3 separate poles switched together.

There are actually 3 switches in the same box, each of these switches has a midpoint and a flip-flop. This switch will go up or down depending on how many times you press the switch. Thus a contact is made with the pins middle + top OR middle + bottom.

The central pins are either connected to the lower pins or to the upper pins. The footswitch is pressed to toggle the switches.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/alf45tar/PedalinoMini/issues/144#issuecomment-711133984, or unsubscribe https://github.com/notifications/unsubscribe-auth/ARNEEFTJRNMC6MXMOFEW3MLSLKQRJANCNFSM4SL2D6FA .

marcochoin commented 4 years ago

I have another question.

I don't understand this part

image

On other sites, they directly connect pin to pin to the oled display. Why is there a resistor there ?

Thanks !

alf45tar commented 4 years ago

The I2C bus pull-up resistor are required by specification. Most of the time they are installed on OLED display board. You can avoid them but if you note some issue with the display I suggest to try to add them.

Regards alf45tar

https://www.ti.com/lit/an/slva689/slva689.pdf?ts=1603174931399&ref_url=https%253A%252F%252Fwww.google.com%252F