Pic

argonrepublic · 6th February 2006, 08:54 PM

I have an obsolete IC that needs to be replaced. Anybody know a programmer that can make one?

Netlist · 6th February 2006, 09:04 PM

What do you need and for what application?

/Hugo

argonrepublic · 6th February 2006, 09:31 PM

The IC is Yamaha key assigner. It scans keys for synthesizer and send key-on data as well as key voltage.
I can email more info

Netlist · 7th February 2006, 10:20 AM

Now, that a though one. I'm afraid I can't help you on this one.

/Hugo

DragonMaster · 19th February 2006, 10:06 PM

And do you know what the data output is? Is it directly to the MIDI protocol?

It could be worked out with a PIC with enough ADCs, but I doubt someone will want to program this...

argonrepublic · 19th February 2006, 11:34 PM

It is not Midi, it is Control Voltage. Hz/Volt protocol

DcibeL · 19th February 2006, 11:49 PM

I am not sure if this will help you, but I learned to use the LM331 and LM2907 at school and they are fairly easy to work with. The LM331 can be used as a voltage to frequency or a frequency to voltage. LM2907 is a better pick for low frequency application.

argonrepublic · 20th February 2006, 05:12 AM

Not quite the same aspect. In this sense, Hz/volt is the way the synth tuning is set. The keys are divided into their determined range. Each key then spplies a voltage to a Voltage controlled Osc. In this case the synth has 37keys. The leftmost key needs to supply .25 volts. The rightmost key needs to supply 4 volts. Also the Osc needs a trigge to let it know start press and release time. In this case, keys provide 9 volts when idle and -4 volts when pressed.

6th February 2006, 08:54 PM	#1
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	Pic I have an obsolete IC that needs to be replaced. Anybody know a programmer that can make one?

19th February 2006, 10:06 PM	#5
DragonMaster diyAudio Member Join Date: Dec 2003 Location: Montreal	And do you know what the data output is? Is it directly to the MIDI protocol? It could be worked out with a PIC with enough ADCs, but I doubt someone will want to program this... __________________ Antoine http://dmsaudio.ca/

19th February 2006, 11:34 PM	#6
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	Pic It is not Midi, it is Control Voltage. Hz/Volt protocol

19th February 2006, 11:49 PM	#7
DcibeL diyAudio Member Join Date: May 2003 Location: Saskatchewan	I am not sure if this will help you, but I learned to use the LM331 and LM2907 at school and they are fairly easy to work with. The LM331 can be used as a voltage to frequency or a frequency to voltage. LM2907 is a better pick for low frequency application. __________________ The power of Science compels you!

20th February 2006, 05:12 AM	#8
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	PIC Not quite the same aspect. In this sense, Hz/volt is the way the synth tuning is set. The keys are divided into their determined range. Each key then spplies a voltage to a Voltage controlled Osc. In this case the synth has 37keys. The leftmost key needs to supply .25 volts. The rightmost key needs to supply 4 volts. Also the Osc needs a trigge to let it know start press and release time. In this case, keys provide 9 volts when idle and -4 volts when pressed.


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6th February 2006, 09:04 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	What do you need and for what application? /Hugo

7th February 2006, 10:20 AM	#4
Netlist diyAudio Moderator Join Date: Jan 2003	Now, that a though one. I'm afraid I can't help you on this one. /Hugo

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