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31  Forum 2005-2010 (read only) / Interfacing / Re: joystick on: August 31, 2006, 01:57:28 pm
in germany, you can order joysticks as spare parts from doepfer (www.doepfer.de). i guess this is not the cheapest way, though.
32  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: 'midi in" project.... on: October 23, 2006, 11:47:09 am
as i reported the circuit with the 6n138 worked here on breadboard. but now i soldered the circuit on stripboard and nothing is working anymore smiley-sad
i tested the optocoupler (0V on the input -> LED light up on the output. seems to work). no idea what might be wrong now.

update: working now again! smiley-wink
 8-)
33  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: 'midi in" project.... on: September 25, 2006, 07:31:04 am
i just finished building the midi in circuit with the 6n138 on breadboard and tested it with your code, kuk.
seems to work fine.  ;D
34  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: 'midi in" project.... on: August 26, 2006, 02:20:11 am
although i did not have a try on the midi in circuit posted above, i searched a bit in the net and found this pdf:
http://www.keyboardpartner.de/hammond/diagrams/MINIvice1.pdf
it's a circuit based on the atmega8, and uses a slightly different midi input circuit. maybe it's worth a try to use this circuit?
it has a 1,2k resistor between VCC and the optocoupler (which is a cny17 - has a different pinning than the 6n138).
35  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: arduino hex files burned directly to atmega8 on: November 15, 2006, 11:03:28 am
and one more noob question  :smiley
when i burn the hex-file in system with the isp, where does the atmega knows that it is being to be programmed? and where does it know when to begin with the normal operation?
does it need some switch oder reset button or something like that?

edit: i just tested smiley works. with connected isp. but the question remains: why does the atmega8 knows that it is to be programmed? (i guess it's not right to post the question here, i'm sure i can find it in some isp documentation on the atmel website, but maybe someone knows and wants to tell me in n00b-compatible language smiley )
36  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: arduino hex files burned directly to atmega8 on: November 15, 2006, 10:59:14 am
Quote
(if you have an old avr-isp, i.e. not a MK II)

dunno?
what is the difference?
it's a serial isp programmer.
37  Forum 2005-2010 (read only) / Frequently-Asked Questions / arduino hex files burned directly to atmega8 on: November 15, 2006, 03:33:44 am
i want to use arduino for realizing smaller projects without the arduino board. (this was discussed in some other thread. taking the atmega8 from arduinoboard to target circuit etc.).
now i am asking myself if it is neccessary to take the atmega8 from the arduino board.
is it possible to use arduino for prototyping and later taking the hex files which it has produced and burning them with a avr isp via avrstudio directly to the target device (a blank atmega8 without bootloader in the target circuit)?
or das the hex file from arduino somehow need the bootloader or something like this?
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