Krankasaurus - Led Wiring

[chromesphere]

Hi guys,

Im sure there is a simple answer to this question. I want to incorporate the 2 seperate leds for boost and distortion for the krankasaurus so i can visually see which is on and off. 

On the build PDF for the krank, it specifically says, LED wiring is left off, which doesnt help me...(Im not familar with dual 3pdt wiring and have no idea how to do this)

Can anyone assist?

You help is appreciated!

CS

[madbean]

I have a diagram somewhere. I'll get it posted later today.

[pauloman80]

If I may, I'll weigh in on this since this was my first build and I ran into the same issue.   

Here's essentially what was shared with me on another msg board, I changed it slightly by relocating the resistor for the LED.



In the case of the Krank, the switch for the distortion side will send its To Output to the From Input of the boost side.  Also, each LED will need to draw power directly from the 9V supply, so from your DC jack you'll connect to the lead for the PCB itself and each LED (four connections).  I just put them together and heat-shrinked the junction, no problems.

[madbean]

Paulo,

In that diagram, when the effect is engaged, your LED is connected directly to ground. The other end of the 4k7 is not connected to anything. When the effect is off, the 4k7 connects from the FX input to ground. This is not what you want. To make this work, put the 4k7 between A2 and A3. Then, attach ground to A3 and B3.
When the switch is "up", A1 and A2 are connected, which connects the LED to the 4k7. When the switch is "down" the LED is disconnected from the resistor, and the FX input is grounded via B3.

[madbean]

This is pretty typical for me to wire up two in one with LEDs. If you are using metal jacks, you only need to ground either the input jack or output. If using plastic, you should probably ground both.





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[pauloman80]

Paulo,

In that diagram, when the effect is engaged, your LED is connected directly to ground. The other end of the 4k7 is not connected to anything. When the effect is off, the 4k7 connects from the FX input to ground. This is not what you want. To make this work, put the 4k7 between A2 and A3. Then, attach ground to A3 and B3.
When the switch is "up", A1 and A2 are connected, which connects the LED to the 4k7. When the switch is "down" the LED is disconnected from the resistor, and the FX input is grounded via B3.

Essentially you're saying the resistor isn't doing anything in the setup I have?  Wouldn't surprise me.    So what exactly is it supposed to do?  I have my switches and LEDs set up exactly like this for my Krank builds, and I haven't noticed any problems associated with it.  Thanks.

[gtr2]

It would be good to sticky the 2fx diagram somewhere (maybe in the learn link) as it's likely to help others out, including me!  Same with the dc jack wiring diagram.

[chromesphere]

Hi All, thanks for the info.

Shortly after i asked the question, i worked out the answer.  Didnt occur to me to put the resistor on the switch though...was going to have it connectored to the LED.  Switch version sounds neater.

Edit: That diagram is very useful!  I've been looking for a 2 FX's in 1 Box "easy to follow" diagram like that for a while now.  Thanks for sharing!

Thanks for your help!!
CS