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DIY Stompboxes => Building your own stompbox => Topic started by: njkmonty on July 19, 2017, 07:38:09 PM

Title: how to implemen a lfo led into Bloodstone Phase Shifter (EHX Bad Stone™ Phaser )
Post by: njkmonty on July 19, 2017, 07:38:09 PM
has anyone done a led lfo rate mod to this circuit?


http://lectric-fx.com/product/bloodstone-phase-shifter-v-1-1/


http://lectric-fx.com/wp-content/uploads/2016/07/Bloodstone_V.1.1.pdf
Title: Re: how to implemen a lfo led into Bloodstone Phase Shifter (EHX Bad Stone™ Phaser )
Post by: Scruffie on July 19, 2017, 07:48:12 PM
Try a diffused LED from pin 8 of the 324 with a 4k7 to ground, if that works but doesn't turn 'off' enough, add another 4k7 in parallel with the LED.

If it works but messes up the sweep you'll need a transistor buffer.
Title: Re: how to implemen a lfo led into Bloodstone Phase Shifter (EHX Bad Stone™ Phaser )
Post by: njkmonty on July 21, 2017, 04:25:56 AM
cheers , i was playing around with the 324 legs but couldnt get any throbbing,  i will give you suggestion a go!

thanks
Title: Re: how to implemen a lfo led into Bloodstone Phase Shifter (EHX Bad Stone™ Phaser )
Post by: njkmonty on July 23, 2017, 06:52:54 AM
no good, i couldnt even get any voltage variation at all from pin 8,  bummer, none of the other pins or rate pot legs etc had any voltage lfo changes i could find
Title: Re: how to implemen a lfo led into Bloodstone Phase Shifter (EHX Bad Stone™ Phaser )
Post by: Scruffie on July 23, 2017, 10:05:38 AM
No moving voltages at all? This might seem like a silly question but, you weren't in manual mode by mistake were you?
Title: Re: how to implemen a lfo led into Bloodstone Phase Shifter (EHX Bad Stone™ Phaser )
Post by: njkmonty on July 23, 2017, 06:10:01 PM
i thought that too,  but will double check again!
Title: Re: how to implemen a lfo led into Bloodstone Phase Shifter (EHX Bad Stone™ Phaser )
Post by: njkmonty on July 23, 2017, 08:02:28 PM
got it working!   yes you were right  i didnt work on either setting, i was using the wrong resistance range,  it turned out  that 82 ohm resistor gave me they best throb. 

thanjkyou!!

i just connected the resistor to the leg of the transistor which connects to the pin of 324 you suggested,, thanks again!!!