Comments on: Chopper Tremolo Effect

By: Mike

Mike — Tue, 24 Nov 2009 16:37:54 +0000

And… Using two 555′s in series (or a 556) will also give slightly more complex patterns.

By: Mike

Mike — Tue, 24 Nov 2009 16:35:59 +0000

Tha u fr sharing this with everyone, I never thought to use a 4066 as the switch… You can get quite high frequencies with a 555 astable instead of you inverter thing. search astable 555 times circuits (wiki has a diagram).

By: asare daniel

asare daniel — Wed, 18 Nov 2009 15:59:16 +0000

i will be very happy if i can be provided with information about chopper circuit, and it’s application as aswitch

By: heri

heri — Wed, 19 Aug 2009 09:52:23 +0000

Thank you for your sharing, it would be useful for the others.

By: Circuit bent mechanical furby sequencer, Bloxes, This is your Brain on Jazz: Researchers use MRI to study spontaneity, creativity, Chopper Tremolo Effect, and 35 Fantastic HDR Pictures

Tue, 11 Mar 2008 10:07:39 +0000

[...] Chopper Tremolo Effect – Simple and low quality circuit (built it in about an hour), based on a simple NAND oscillator from an LED Chaser circuit. [...]

By: aaron

aaron — Sun, 09 Mar 2008 23:44:39 +0000

woah, i don’t think you need to take it that far! It’s been a while since I did FX pedals, but i think I remember a really simple solution to the popping – it was to place a small cap (i think it was on order of pFs) across the switch leads (ie, from signal to ground).

By: Ben

Ben — Sun, 09 Mar 2008 14:22:54 +0000

@vic

Googled up a bit on Zero-Crossing. Let me see if I understood you correctly. You suggest something like using a comparator to determine a signal zero, and use perhaps a D-type flip flop to latch the clock signal, so that switching will only occur when the input signal is at zero?

By: vic

vic — Sun, 09 Mar 2008 12:45:35 +0000

Hi,

the popping noise you describe is due to abrupt switching of the signal from some non null value to zero. To remove this, you need to add a zero-crossing circuit to trigger the switching. A number of digital potentiometers have a built-in zero-crossing detector. For example the max5457, which also has a mute input which you could use directly in your circuit.

By: H&B » Blog Archive » DIY Tremolo Effect

H&B » Blog Archive » DIY Tremolo Effect — Sun, 09 Mar 2008 11:03:16 +0000

[...] Ben sent in his tremolo effects pedal that he made out of a couple of 4066 IC’s. The circuit has its limitations, since it is based on an LED chaser, but the overall effect is pretty cool. Ben is a long time reader, and a first time submitter to the MAKE blog. Let’s hope he makes some more cool projects and shares them with us in the future. – Link [...]