Muff's Modules & More

davebr · Posted: Fri May 11, 2012 11:09 pm Post subject: Tap Tempo LFO module

I wanted a Tap Tempo LFO module and decided to design one using the Molten Voltage/Pedal Sync MV-55 Tru-Foot LFO chip. I used the "B" version which powers up to the CV inputs rather than the default program. I built the Tap Tempo LFO into a 2U MOTM-style module.

It has both CV inputs and controls for Rate, Ratio, Duty, and Offset. I added level switches for +/-5 volt or 0 to +5 volt outputs. I added an external tap / clock input with an LED to indicate when the LFO is in sync with the external input. LEDs on all three outputs indicate the polarity (red/green for +/-5 volt and green/off for 0 to +5 volt operation).

I used a momentary toggle switch for the tap as I would rather press "down" rather than "into" a module.

The MV-55B does require about 85 mA of 3.3V so I added an option to run the module off of +/-15 volts or +5 and +/-15 volts. I hand wired the board since I was only building one. I have schematics, photos, and a lot of scope images on my Tap Tempo LFO page.

Molten Voltage/Pedal Sync was very quick to respond to all of my emails about the operation of this and their other parts. I have links to both sites on my page.

Dave

numbertalk · Posted: Fri May 11, 2012 11:11 pm Post subject:

Very cool. Thanks for sharing.

boothnavy · Posted: Fri May 11, 2012 11:27 pm Post subject:

Dang Dave, that's smooth like silk, like a glass of milk.

msprigings · Posted: Fri May 11, 2012 11:29 pm Post subject:

Looks great Dave!

falafelbiels · Posted: Sat May 12, 2012 5:24 am Post subject:

Mine died on me eek!

DIY Euro + new cabinet = FUUUCCKKKK!!!

I'm going to build all over though, likely with all bells and whistles like yours'.
Very neat build!

L-1 · Posted: Sat May 12, 2012 7:57 am Post subject:

Want to build. Chips are at Smallbear http://www.smallbearelec.com/servlet/Detail?no=929

numbertalk · Posted: Sat May 12, 2012 11:01 am Post subject:

Any chance Dave of doing a run of PCBs for this, either you or someone else? I'd be down for 1 for sure.

MoltenVoltage · Posted: Sat May 12, 2012 11:37 am Post subject:

falafelbiels · Posted: Sat May 12, 2012 6:35 pm Post subject:

MoltenVoltage

Hey you on here!

keninverse · Posted: Sat May 12, 2012 9:18 pm Post subject:

Mr. Dave...it looks like you're using TE headers and connectors. How are these compared to Molex KK MTAs?

davebr · Posted: Sun May 13, 2012 12:41 am Post subject:

sonicwarrior · Posted: Tue Jun 12, 2012 4:10 am Post subject:

Nice alternative to the Tap Tempo LFO from Electric Druid.
Would be nice to have a finished PCB for this (gee, I'm lazy).

Luka · Posted: Sat Oct 13, 2012 7:57 pm Post subject:

this looks great dave!