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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

2375.0. "How to build your own MIDI interface." by FORTY2::TATHAM (Nick Tatham @REO) Mon Mar 20 1989 11:44

T.RTitleUserPersonal
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2375.1which??????VIVIAN::S_GOLDSTEINSteve G... DTN: 847-5416Mon Mar 20 1989 14:351
    		Which Issue of ST/Amiga 
2375.2FORTY2::TATHAMNick Tatham @REOTue Mar 21 1989 06:207
> Which Issue of ST/Amiga 

It was probably Oct-88 or Nov-88 - I borrowed it so can't find out easily -
I'll see what I can do.

Nick

2375.3Need help w/ transistor typeRGB::SCOTTWed Sep 12 1990 12:048
	(Belated) Thanks for posting this circuit. One question - could
you please give a hint as to what type of transistors are used? I don't
recognize the BC number. The info I'm looking for is: NPN or PNP, and
approximate gain. 

							Rob

2375.4BC547 revealedFORTY2::TATHAMNick Tatham @REOThu Sep 13 1990 18:3320
My trusty Maplin catalogue lists BC547 as:

	      Case = TO92a
	      Type = NPN
	V-CEO(max) = 45 V
	V-CBO(max) = 50 V
	V-EBO(max) = 6 V
	   Ic(max) = 100 mA
	P-TOT(max) = 500 mW
	  Typ h-FE = 520 @ Ic = 2 ma
	   Typ f-T = 300 MHz
	     Price = 10 pence

h-FE is the gain isn't it? It also says that a BC547 is a BC107 in a
plastic case.

Hope this helps,

Nick
2375.5Garden varitey transistorRGB::SCOTTThu Sep 13 1990 18:555

     Thanks much! It looks like a trusty 2N2222 will do just fine. 

							Rob
2375.6WELSWS::FINNISThu Sep 13 1990 22:5310
    
    Sorry if the first lead was a bum steer ,
    
    Looks like the old note has been revitalised though !!
    
    
    Anyone Know of a `cheap'  MIDI keyboard
    
    
    			- Pete -
2375.7Casio makes the least expensive MIDI KbsRGB::SCOTTFri Sep 14 1990 12:3212
>    Anyone Know of a `cheap'  MIDI keyboard
    
	I have a Casio MT540 - bought a demo unit for $140. A couple of
months back, the MT240 was on sale at numerous places for $120 or so. That's
about the cheapest MIDI keyboard you can get! Damark also has the next
Casio model up from mine on sale for $199. (Just threw away my catalog,
so I don't have the details).

	Also check out the DNEAST::COMMUSIC conference for more MIDI info
than you probably want :-)

							Rob
2375.8WELSWS::FINNISSun Sep 16 1990 21:367
    
    		Thanks I'll give that conference a go.
    
    	Unfortunately there seems to be little under 100 Pounds in
    the Uk..
    
    			-Pete-