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CasioSK · Casio SK-5 and SK-8
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How do you use an LFO to trigger a bend?   Message List  
Reply | Forward Message #494 of 580 |
Hi all,
so I bent my casio sk-1 and I know how to build an LFO using a 555 timer ic. I
found two points on the sk-1 pcb that when shorted trigger the one-key-play
button. I want to be able to control the continuous rate at which the
one-key-play is triggered via an LFO, but I can't use a photoresistor vactrol
because at higher rates photoresistors don't react fast enough and the LFO
fails.
So my question is what's the alternative to the vactrol?
Sun Mar 15, 2009 8:27 am

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dirtyoldpoo
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Forward 		Message #494 of 580 |
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Hi all, so I bent my casio sk-1 and I know how to build an LFO using a 555 timer ic. I found two points on the sk-1 pcb that when shorted trigger the... 		dirtyoldpoo
Offline Send Email 		Mar 15, 2009
8:27 am

you could use the 555 to trigger a small reed or ss relay. Find a simple LED blink circuit, and put the relay in line with the led. Or find an led relay...
stolenfat
Offline Send Email 		Mar 15, 2009
9:10 pm

Can you use a transistor instead of a reed/relay? It seems like that's what this guy did: http://gieskes.nl/circuitbending/?file=casio_vl_tone...
dirtyoldpoo
Offline Send Email 		Mar 15, 2009
11:22 pm

i dont really know if a transistor would work- but they our kinda out of my area of knowledge... not to good with them yet.  But i generally look at them as...
Comrade Cal
stolenfat
Offline Send Email 		Mar 16, 2009
12:30 am

Solid state relays are kinda expensive. I don't know much about transistors either, but I have been reading up in wiki, and it says they're used as amplifiers,...
dirtyoldpoo
Offline Send Email 		Mar 16, 2009
7:44 pm

you could also try going CMOS the 4066 is 4 switches in one.  When there is a high voltage (or maybe it's a low ) at the control pin, it will allow the...
Comrade Cal
stolenfat
Offline Send Email 		Mar 16, 2009
7:54 pm
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