Category Archives: Pedal board

Re-thinking the PU-2 interface: long live the MP-1

A lot of work was done on the PU-2 over the last many months by Emanuele and I. More specifically, we wrote hundreds of line of code to make the FCB1010 work with Banks of Stompbox mode midi commands. This … Continue reading

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VC-1: More impedance control

In the previous post, I described the circuit that I’m using to emulate a potentiometer using a couple of opto-isolator (or opto-couplers?). There is one small problem with the circuit: the input impedance has to be quite low. If you … Continue reading

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VC-1: Digital/Midi Volume Control

A user asked if I could design an FCB1010/PU-2 volume control. I love challenges… It took me weeks to get one working properly. The are two main parts to this: the analog side and the digital side. The analog side … Continue reading

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PU-2: SD card capacity

I have just written a new version of the software that is used to convert a .CSV file into a Sysex file that the PU-2 can process. This version uses the SD card. Preleminary tests show that 2000 midi commands … Continue reading

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SD Card reader: No Voltage required!

While testing a slight modification on the PU-2 prototype, I decided to test the current draw of the SD Card reader described in the previous post. I placed my multimeter in series with the 3.3 volt pin and measured 11 … Continue reading

Posted in Arduino, FCB1010, Pedal board, PU-2 | 4 Comments

PU-2: Data on SD card

Just in time! I received the SD card readers the day that I had planned to ship the first PU-2 Beta. I re-opened the boxes and fitted the card reader in each prototype. This is the SD card reader that … Continue reading

Posted in Arduino, FCB1010, Pedal board, PU-2 | 1 Comment

FCB1010 vs PU-2: Why do it?

While waiting for parts (I do have to get a better inventory “system”) to complete the Betas for the PU-2, I went through a short period of discouragement. It’s hard to stay fully motivated when the project is bogged down … Continue reading

Posted in Arduino, FCB1010, Pedal board, PU-2 | 5 Comments

PU-2: Last delay

As I’m completing assembly of the first of five prototypes, I decided to test the unit before putting it all into a box. Since I want the PU-2 to include a USB-Midi interface, I use the technology that I documented … Continue reading

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PU-2: A batch of Beta

I’m getting comfortable making the PCBs for the PU-2. This is what a batch of 5 boards looks like, fresh out of the etching tank. I still have to drill the 800-plus holes and solder everything… patience… This is what … Continue reading

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PU-2: Meet Beta!

The PU-2 made it to Beta. As you can see in the picture above, the PU-2 is an external module, linked to a connecting board inside the Behringer FCB1010 with a flat cable. The reason for the external module  is … Continue reading

Posted in Arduino, FCB1010, Pedal board, PU-2 | Tagged , , , , , , , | 4 Comments