Messages

91

PreenFM1 (the blue one) / Re: OLED display works!

« on: August 17, 2012, 06:58:16 PM »

I don't think I would include one in the kit. Plus they're also supposedly shorter in life, they burn out like old CRTs did. But that's not really a problem on a DIY kit.

92

PreenFM1 (the blue one) / Re: Encoders question

« on: August 16, 2012, 12:13:18 PM »

If they mount the board they should work. You will need to cut off the two pins for the switch though. Editing values may be a little slower due to less pulses per turn.

93

PreenFM1 (the blue one) / Re: Cell phone charger as power supply

« on: August 10, 2012, 10:55:14 PM »

Been using a USB charger for ages. You can ever get 4 way mains sockets with a USB output built it.

94

PreenFM1 (the blue one) / Re: OLED display works!

« on: July 23, 2012, 09:47:35 PM »

I had a red translucent case made, but a screwed up the measurements slightly so had to file it.

But you are right, probably no need to have the display angled with OLED.

95

PreenFM1 (the blue one) / Re: flashing firmware from a mac?

« on: June 04, 2012, 02:09:22 PM »

Syntax isn't 100% correct, being a Unix style OS you have to point to the location of the app.

So if it is in the current directory you use this:

./OpenMoko\ Flasher.app/Contents/MacOS/dfu-util -a1 -d 0x1EAF:0x0003 -D PreenFM_R3_v1.71.bin -R


Or if you have the app in the applications folder:

/Applications/OpenMoko\ Flasher.app/Contents/MacOS/dfu-util -a1 -d 0x1EAF:0x0003 -D PreenFM_R3_v1.71.bin -R

96

PreenFM1 (the blue one) / Re: Presets for PreenFm (128 patches bank included)

« on: June 03, 2012, 09:20:34 PM »

I found that dumping to the PreenFM failed unless I told it that something way coming by selecting Load then Sysex.

Otherwise although it recognised that something has been received and asked me which bank to save to, when I did it was full of junk patches.

97

PreenFM1 (the blue one) / Re: flashing firmware from a mac?

« on: June 03, 2012, 06:21:24 PM »

XCode is free. Just download it from App Store.

That OpenMoko flasher works. You just call it's dfu-util from the command line. eg:

>OpenMoko\ Flasher.app/Contents/MacOS/dfu-util -a1 -d 0x1EAF:0x0003 -D PreenFM_R3_v1.71.bin -R

Works for me.

98

PreenFM1 (the blue one) / Re: MIDI on / off issues (1.61)

« on: May 19, 2012, 10:52:44 PM »

Can you use the MIDI thru port on one of your devices to send the output to your preen?

99

PreenFM1 (the blue one) / Re: OLED display works!

« on: April 22, 2012, 08:51:12 PM »

They are well worth it. The viewing angle is brilliant, if you can see the screen then you can read it. Plus you don't notice how slow LCDs are until you've seen OLED.

Here's the difference, OLEDs are much thinner and the bezel is smaller as there's no backlight.

100

PreenFM1 (the blue one) / Re: It's alive!

« on: April 22, 2012, 08:41:08 PM »

Okay well I'm more than happy with the FM sounds.

I guess you would need some DSP grunt to do more complex things.

101

PreenFM1 (the blue one) / OLED display works!

« on: April 19, 2012, 06:56:24 PM »

I've swapped my LCD for an OLED and it worked fine. So fast and clear. The only downside is the bezel is much smaller, so I need to have a new one made.

Only one other tiny downside, the LCDs show a blank pattern on start up, this is completely black and shows nothing. So for a few seconds it looks like the Preen isn't working.

I got it here:

http://www.picaxe.com/Hardware/Add-on-Modules/Serial-OLED-Module-20x4/

102

PreenFM1 (the blue one) / Re: MIDI on / off issues (1.61)

« on: April 17, 2012, 10:24:29 PM »

6581, this resistance thing is very interesting.

Well an opto isolator is basically an LED and a phototransistor, so if you use too big a resistor this limits the brightness of the LED too much nothing gets received the other side?

103

PreenFM1 (the blue one) / Re: [Solved]Sound level problem :))))

« on: April 17, 2012, 10:19:22 PM »

I have bought an 20x4 OLED display for it today. Hopefully it will be plug n play (seems to generally be the case).

104

PreenFM1 (the blue one) / Re: MIDI on / off issues (1.61)

« on: April 17, 2012, 12:30:47 PM »

I had a similar issue on the MIDIBox project I built, I had put the wrong resistor (too much resistance) in the MIDI input and as a result the signal was at too low a level.

I suspect in your case it could be an intermittent issue as well. Which may explain why it receives some data some of the time.

When you play a note on the keyboard it sends a note on and a note off value, the note will continue if it doesn't ever receive the note off value.

105

PreenFM1 (the blue one) / Re: MIDI on / off issues (1.61)

« on: April 17, 2012, 09:07:16 AM »

I would check the resistor values around the MIDI in. Too big a value and the input won't work. Always check for soldering issues too