wanttaja@ssc-vax.UUCP (Ronald J Wanttaja) (05/07/85)
> On the cheaper sided (for those who want sound but not excellent quality > I suggest just hooking the output to a regular 8 ohm speaker. If you > don't have the appropriate plugs, Radio Shack sells these very cheap. > like I said the sound quality is about as good as a TV speaker but the > only difference is that you cannot adjust the volume. Those who are > experienced at fiddling with electronics could probably fix this. > Hmmmph. I used to do that with 555 timer ics. Worked fine for about 30 sec, then BLOOOOIE. It may work on the '64, but I would want to put a little isolation in to protect the computer, as I suspect the output impedance of the computer audio is higher than eight ohms. Either: 1. Use a 1000 ohm/8 ohm audio output transformer (available from Rat Shack for about $1.50). 1000 ohm side to audio output and ground, 8 ohm side to the speaker leads. You could even wire a 10K pot into the audio side for a volume control. 2. Put a 100 microfarad capacitor in series with the speaker, to stop the DC and let the audio signal through. This is how I got my 555s to last longer :-). The whole thing also depends on whether the '64 has enough audio output to drive a speaker without amplification. Try an earphone :-). Ron Wanttaja (ssc-vax!wanttaja)