From: Daniel O'Shea (dan_at_ozramp.net.au)
Date: 2007-04-08 00:52:14
Jim Brain wrote: > I'm not sure I can shed light on whether the ideas presented work, but I > know I tried the transistor idea and some others when I was trying to > emulate the paddle and had no luck. Jim, are you certain about the transistor idea not working though? in the old thread: http://www.softwolves.pp.se/misc/arkiv/cbm-hackers/9/index.html#9813 ...you say, "I did not try a current approach (Analog is my weak subject), but wouldn't I need some sort of analog input to the transistor in order to bias it to a certain level?" and then later: "I'd travel down the path, but as of last night, the idea used by the 1351 designers and Hársfalvi noted in his project is working pretty well"? Pasi Ojala wrote: > I am also no analog expert by any means, but it still seems > to me that it would be possible to simply use a series resistor > to convert the external voltage level into a current. > > When used "normally", the voltage is constant and the resistance > changes, changing the current that charges the capacitor. > If the voltage changes, but the resistance remains the same, > the current that charges the capacitor changes. Both cases > should seem about the same to the capacitor.. ...so which is it to be then? a transistor, or a resistor? (isn't a transistor a type of resistor anyway?) Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.