Spin Semiconductor

Right - the EEPROMs are not all that expensive, but in order to use more than 8 programs, I need to enable and disable every other EEPROM, which takes more digital pins on the Arduino to do so in the event of 4 EEPROMs versus 3 EEPROMs,

thanks,

BC

Hi, I'm currently working on a project with two channels that each have their own (mono) FV-1. I change the programs on both FV-1 ICs by means of an Arduino. The Arduino changes the programs of each FV1 by means of dedicated digital lines. I use 2 EEPROMs which the Arduiino enables or disables, depe...

Small update, I did not find any way to combine the outputs of 2 74HC148 ICs, so I decided to switch to a Arduino Nano so I can deal with the timing in software.

BC

I think I need to use some sort of flip-flop that addresses one EEPROM while the other one is "un-adressed". A simple inverter should do, one EEPROM is addressed by the debounced switch and the other by the debounced switch through the inverter. As long as A0 (or which ever pin is conveni...

Hi Frank, I was indeed thinking about adding an RC network to avoid bouncing. Now you mention it, it dawns on me the RC can also be used to slow down the program select enough to allow the EEPROMs for being switched. I think I need to use some sort of flip-flop that addresses one EEPROM while the ot...

You can have more tan 8 but you need to disable one EEPROM so that one of the address pins is at +3.3V as the FV-1 reads the device where A2=A1=A0=0V After changing the A pin you need to make the FV-1 read in the program from the enabled EEPROM by changing the S pins to the new program. Of course i...

I'm going to try this one:

https://modwiggler.com/forum/viewtopic.php?t=172214

BC

Cheers Frank, I'll research that site and post my design here.

BC

Hi,

is there any info on howto implement a dry/wet knob for the effects?

Cheers!

BC

Hi,

I think I might have found a problem in the datasheet. Where the 50K pots are linked together, the line goes to DVD. A junction symbol seems to miss there. Am I correct?

Cheers,
BC

OK, right, thanks - I figured they were indeed following the forum. I also thought you were a Spin employee. Sorry for the confusion,

BC

Hi all,

I'm planning to use the VF-1 in a commercial product and was wondering what to expect of the availability of these chips in the future. Will they be produced for quite some time?

Cheers!

BC

Hi Frank,

makes sense, thanks.
The problem of the same program might be fixed by a rotary switch to select programs. To get to a different program you will switch up or down to another program and it will always be different from the original program. But do correct me if I'm wrong.

Cheers,

BC

There are a number of way to add more than 8 programs, the simplest method would be to use more than one eeprom on the i2c bus this would provide multiples of 8 ie 3 eeproms =24 programs. Another way would be to use a micro controller which has internal eeprom space which would send the selected pr...

OK, I put some of the PDF in Google Translate and apparently the author says he uses just one of the EEPROMs at the same time. I suppose he uses DIL sockets. J5 seems to be for his EEPROM programmer. So at this point it does not seem to be possible to have more than 8 programs, is this correct? Chee...