Comments on: Red Llama

By: costin

costin — Fri, 10 Feb 2012 22:51:42 +0000

Greetings from Roumania. I have just finished my red llama an hour ago and i love it. Thank you for making this possible. I’m gonna star building the ube screamer tomorrow.

By: DIYtechgear

DIYtechgear — Tue, 17 Jan 2012 19:58:53 +0000

Built this pedal recently and hooked up a 3pdt switch for true bypass and threw in a neat turquoise LED for effect. This pedal can make some great sounds and can be controlled very easily with the volume knob on your guitar.

Is the reason for not connecting the unused leads of the IC to ground to prevent power consumption?

Thanks Gauss for everything!

By: Bruce

Bruce — Sun, 25 Sep 2011 19:59:16 +0000

Barry at GuitarPCB.com made me the PCB. I jammed it into a 1590, and man, is it cool!!

Thanks Gauss for the great contributions!!

By: gaussmarkov

gaussmarkov — Thu, 31 Mar 2011 12:29:17 +0000

Hi Tony,

This is a little confusing. The original circuit has a 1M pull-down resistor on lug 2, which is usually just conneted to the output jack. This resistor is unnecessary and you can leave off the connection to the board and leave out the pull-down resistor if you like.

Also, it would be a good idea to add a pull-down resistor to the input. It is odd that one isn’ there but that is apparently the way the original circuit was configured.

All the best, gm/Paul

By: Tony

Tony — Wed, 30 Mar 2011 22:18:10 +0000

If vol lug 2 is for output then why does the board schem show all 3 lugs wired to the pcb?

By: Matt

Matt — Fri, 04 Feb 2011 16:13:11 +0000

Hey there – thanks for posting so many great schematics and layouts. Your site is a great resource for the DIYer, especially novices like me. I recently built a Red Llama on perfboard based on your layout. I made a few parts changes: replaced the 330uF power supply cap with a 1000uF unit, and replaced the 1K ohm resistor in series with the battery with a 56 ohm unit (the resistor change was made in order to reduce the voltage drop across the resistor.) I also had to change the layout a bit, since I negligently ordered an axial rather than radial power supply cap. However, I left the circuit as shown. The pedal works (and it actually worked the first time I powered it up, to my surprise and delight!), but it does get a little noisy as the volume knob gets above 12 o’clock. I’ve verified that the noise is coming from the pedal itself, and not the guitar (I muted the guitar’s volume controls; the Red Llama was the only pedal in the signal chain). I checked all the solder joints, and replace the signal wire from the input jack to the switch and from the switch to the output jack with shielded cable, although the signal wires to and from the board are still unshielded. I also tried swapping ICs just to make sure the part itself wasn’t noisy. I’ve gone over the circuit again and again, and can’t find any errors. I would really appreciate it if you had any tips! Thanks!

By: Rafael

Rafael — Sun, 15 Aug 2010 22:00:43 +0000

Hi.

I can’t seem to find CD4049UBE, the local electronics shop only stocks a CD4049 and a CD4049BT, will any of these work?

Thanks!

By: Zack

Zack — Mon, 07 Jun 2010 20:41:54 +0000

Also, on EAGLE how do you export the PCB image of a schematic? Thanks.

By: Zack

Zack — Mon, 07 Jun 2010 20:40:46 +0000

Can these be used to make a PCB? Or are they for perf board only?

By: walker

walker — Wed, 24 Feb 2010 05:34:12 +0000

Having successfully completed (took forever) an LBP-1 and a Bazz Fuss, I’m thinking of trying the Red Llama.

How/where would one add a tone control to this circuit? Is it a good idea?