adamjking

arumblack: Yeah, I was thinking the smae thing with the + and - pins. Its just not clearly stated like it is on the datasheet of the ones you were looking at. Xsou, yes I saw the mec switches in the Farnell catalog. They look very cool but at about AU$ 11.00 each they are too pricey. How many do they send in a sample request? Cheers.

Ahh, thanks. I think this is what I want: http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=359509&e_categoryid=142&e_pcodeid=01007 Round, momentary switch with built in LED - tho I can't tell from the datasheet (http://www.mouser.com/catalog/specsheets/0110105.pdf) whether there are seperate pins for the LED.

Hi all, I'm looking around at the moment for pushbuttons to use with my midibox hardware controller. I want to use momentary buttons as well as LED's, and was wondering if anyone sells momentary buttons with in-built LED's. I think the led would have to have seperate solder tags to the switch for the led to be controlled by MIOS. Does anyone know if such a product exists?

For Australian MidiBox builders, the backlit 2 x 16 LCD display from Dick Smith (Product no. Z4172) has the following performance: 3339 * 8 * 100 nS = 2.67mS

Doesn't the "B Taper" and "D Taper" mean they are logarithmic, not linear?

Hi All, I was wondering, does anyone know if ALPS makes their linear slider pots (faders) in a 10K version? I was looking at the Farnel website and they only sell the linear ones in a 50K version. Does anyone know if/where you can get the 10K linears, or will the 50K be ok to use? Cheers.

I *think* they can be just crimpped on, but I always add a drop of solder to be sure, and crimp the top of the pins to the wire jacket.

Yep, from the page (http://www.futurlec.com/Connectors/HDCONNS2.shtml): Requires Header Pins (HDPINF). These connectors are great, saves having to solder wires directly to the board/pin. Looks like they've also got cheap ($0.25 each) IDC sockets: http://www.futurlec.com/ConnIDC.shtml

http://www.futurlec.com/ConnHead.shtml is a good source for the SIL connectors. Scroll down the page until you get to "Connectors for Headers - Single Row". Be sure to order the pins as well - the pins attach to the wire and are then inserted into the connectors.

Hi All, I've just finished building the core module and am doing the voltage test. The voltages are all measuring correct according to the test on the mbhp_core page: IC1:MCLR(1) - IC1:Vss(12) = 5V IC1:Vdd(11) - IC1:Vss(12) = 5V IC1:Vdd(32) - IC1:Vss(31) = 5V IC2(8) - IC2:(5) = 5V I just have a question regarding the entry in the FAQ. The FAQ says to then test the core module with the IC's plugged in and measure for 5 volts between any ground and 5V pin. I am still getting 5V on all the above pins EXCEPT for the MCLR (pin 1). Should this not be 5V with the PIC plugged in, or do I have a short somewhere in my circuit? Thanks.

Thanks Steven, I've already considered having a seperate button to enable/disable the jog wheel. But what I'm trying for is one-handed operation so it can be used for live "scratching" of sound files. Thorsten mentions on the MIDIBox64E page that "There are also encoders available with built-in switch (button), which could be connected to some free DIN inputs" so i'm guessing these are the encoders he is refering to. I'm just wondering if the encoder can be setup so that the built in switch can be used to activate/deactive itself, or only as a button hooked up to something different. If it can't be done then I wonder if some programming could be done to only send pulses when the button is depressed?

Steven, Before I buy my rotary encoders, i have just a couple of questions I was hoping you could answer. Farnell has ALPS rotary encoders (http://international2.farnell.com/Search/level_5.jhtml?PRODID=46925&SKUID=44864) and their datasheet says they can be modified to be non-detented. Is this what you mean by removing the spring, and does this mean they no longer 'click'? Also, the datasheet says they can be modified to a push on switch. Does this mean you could create a jog wheel that needs to be pushed in a little before it will send data? Cheers.

Hi there, Just wondering if someone has a closeup image of how the pots are wired to the AIN module - a high res image of the photo on the AIN module page would be good if it is available? Cheers.

Hi All, I was just wondering if there is a schematic anywhere for the JDM with the in-circuit programming pins as well. Looking at the PCB layout, it looks like you need to connect five pins to: Pin 1, Pin 12, Pin 11, Pin 39 and Pin 40.... is this correct? Cheers, Meeshka

Hi All, The JDM seems to be working now so I'm just posting a follow up. As I thought, the extremely low voltages were caused by a bad connection somewhere - a re-solder of the serial plug brought the voltages right up to a much closer level. Following wilba's advice I upgraded the 8.2V zener to 9.1V. With the addition of the two 9V batteries I was getting close enough to the correct voltages. When I tired to program the 18f452, i was getting a verified failed. Swapping to COM1 and a connection to SGND seemed to fix that problem (not sure which one it was as i did them both at the same time). Now, the programming of the bootstrap loader seems to have worked - is therre any other way to verify that it burned correctly or is the "Verify after programming" enough? Thanks all for your help, now that i've finished the JDM (with all the optional extras ;)) I can begin on the core module.

Thanks Wilba, I've replied to your email - it's good to know there's another midibox'r nearby. Hopefully you can help me figure this out and i'll post the solution back to the forum. Cheers.

Hi all, I've created the JDM module from scratch (no PCB, on a proto board) and am having problems getting the correct voltages in the hardware test. I have laid out all the component identical to the schematic, and when i run the hardware check the voltages i am measuring (with a battery multimeter) are waaaay too low. The data in/out toggles fine but the voltages are not right. I have checked and rechecked the circuit many times, replaced the transistors, tried different PC's ( win98 ), different cables, adding the two 9v batteries, everything i can think of. Does anyone have any more advice on where the problem could lie? I have looked through all the JDM issue pages but can't find my problem. I'll be getting a more experienced friend to check my circuit, i was just hoping someone might have any pointers or additional tests i can try first? Cheers.

Hi All. The midibox i want to create is mainly to be used with the excellent Linux dj'ing program terminatorX (www.terminatorx.cx). Basically, the program allows playback of multiple tracks, with mixing, effects, scratching, etc - all mappable by MIDI. I want to create a live mixing console (maybe 4 channels) for use with the program. I am hoping that the Midibox64 with MIOS can be adapted for this... this is how i see it working: Volume, pitch, effects etc are controlled by anologue pots/faders (hooked up to AIN module), mapped to midi CC events - a different channel for each track in the software. Buttons for mute, solo, trigger etc are controlled by push buttons (hooked up to DIN module), mapped to midi note on/off for different functions. Scratching is controlled by a separate jog wheel (rotary encoders are used for this?) for each track (hooked up to AIN module), mapped to midi a midi CC event - a different channel for each track in software. This is my basic idea. I really don't know much about MIDI so if Thorsten (I don't know if you've played with this program) or anyone can give me some pointers or ideas I'd appreciate it. Cheers, meeshka

Thanks Voltrigger, I am still quite new to electronics/PICs/MIDI so I am happy to just build it one module at a time and learn as I go along. I work in the city, very close to two electronic stores so its not really a problem. I will take your advice on the PIC tho, I just wanted to check that the 18F452 is the recommended one to be using now. Thanks for the reply, meeshka

Hi All. I'm new to uCApps and after reading through the many pages I am going to start on building a MIDIbox64, one module at a time. There is a lot of info on the site with different projects, chips, etc and I just wanted to check with everyone, to make sure that I have the steps 'round the right way. My initial plans are: I am going to start by building the JDM. Once built, I buy the chip (PIC18F452) and burn in the MIOS bootstrap loader using IC-PROG via serial cable. Once the other modules are built, i then upload the OS/apps via midi using MIDI-OX. I just want to check that this is the right way 'round to start - any info would be aprreciated. Cheers.