Rate Indicator for Tri-Vibe

[RickS]

Is that red LED (around the middle of the pcb) make any light? Could i profit from making a hole for that LED in the enclosure? (show LFO speed, or anything fancy)

No, it does not light up at all, so no LFO speed indicator I'm afraid. 

You can easily have RATE indication as I did during prototyping stage:  connect a 2k7 resistor in series with an LED from U3:pin1 (squarewave output of the LFO) to GND.  You may want to adjust resistor value for optimum brightness, perhaps between 2k2 and 10k.  In my case 2k7 was pretty bright with a transparent red LED.

Got another Tri-Vibe question, if I may.

The build notes on ROG web page for Tri-Vibe describe an optional rate indicator LED by tapping pin 7 of U3b.

Sebastian mentions in the forum back when the TV was introduced that he created a rate indicator LED by tapping pin 1 of U3.  (see quote above)

Is there any relative advantage/disadvantage to either method?  Will they both work OK?  Does one offer less chance of creating noise, inducing LFO ticks, whooshes, thumps, etc?  Better battery life with one or the other?

Thanks very much for any help.

Rick S

[B Tremblay]

Follow the instructions within the project.  Other builders may use different designations and swap around the halves of ICs when creating layouts, though.

[RickS]

Thanks!  That's the way I was leaning.