ballfire wrote:Is there a possibility you can create a simple flanger diy pedal out of pt2399 echo chip?..coz i have seen a chorus based on pt2399 by rick holt?
DeanM wrote:I just looked at the PT2396. that can do delay times of 12.3ms. Would that be good enough for flanger?
Has anyone considered using that chip? theres more external parts required including a 2MHz crystal but that would still probably be cheaper than using two 2399s? also the delay times can be set by a microcontroller using a serial data input. probably a lil more complicated than necessary but there is an "easy mode" that uses four digital inputs (DL1 - DL4) to set the delay times in steps. this could be done with say internal dip switches for presetting the delay time. or if you wanted it adjustable a microcontroller could still be used even in easy mode. for example, if you wanted to avoid serial programming and the timings involved you could use a small little pic microcontroller with an adc. hook up a pot to ground and 5V and use the wiper as an input. by reading the ADC level you could set 4 digital outputs to control the delay times. or even ditch the ADC and use digital switch to toggle through the delay times.
Does this sound interesting to anybody? Is there a reason this hasn't been looked at instead of using two pt2399s? I mean, other than some of the reasons i mentioned above, is there any limitations that i've missed or overlooked? I haven't looked at flanger pedals so don't know too much about the circuit requirements etc.
mictester wrote:You've overlooked the fact that the delay is stepped - a musically useful flanger has the delay swept between two values.
culturejam wrote:Equally important: the PT2396 if farkin HUGE.
Hides-His-Eyes wrote:you could try v_ref modulation like the little angel
DeanM wrote:Also in SO package the 2396 comes down to 300mm, same as the 2399!
Hides-His-Eyes wrote:my brain "autocorrected" for you. The Belton Brick is probably as close to that number as you could get
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