hi,
i tried a voltage drop crash on my sk-100. with low batteries it works really fine. so i soldered a pot(1k) between the plus of the power supply and the board and it just don't works, even at voltages it should work. where is the problem?
thanks,
matthias
strange.. 1K should do it. did you connect it right ? maybe in series with a trimmer..
yes i think i connected it right. perhaps it's about the power supply. has anybody experiences with doing the drop crash with to a power supply. maybe i should try it with an capacitor after the pot. but what kind of capacitor? and with an resistance parallel to the capacitor? i just don't know.
matthias
I don't think the voltage crash works when the unit is plugged into the wall , perahps the fact that it has 120V available, the voltage crash doesn't work - but I am not sure...anyone?
ehh yeah.. i didnt like the idea of shorting batteries but a transformer? i dont know guys, i think you should consider using a vco to under-clock your machine. it might be a lot more reliable in the long run.
Don't short out the power supply, whether it's batteries *or* a mains power supply.
You need to get or make some sort of adjustable power supply. Go and find a circuit for a variable voltage regulator, and build that. You can just make the regulator stage and run it off an unregulated wall-wart. Something like this should do the job:
http://diyaudioprojects.com/Technical/Voltage-Regulator/ (http://diyaudioprojects.com/Technical/Voltage-Regulator/)
Gordon MM0YEQ