Building the tap tempo tremolo

[Taylor]

For my Bob Terwilliger-sized feet, I can't stomp 3 switches in anything smaller than a 1790ns probably. But if I were you I'd just lay out the switch on a box in various setups and see what feels comfortable to you.

[Ultrakd]

ok yea I got big feet to lol. thanks for the help cant wait to start building the pedal.

[Ultrakd]

How do you add expression jacks for the multiplier and speed?

[wizardsofzen]

i was looking around and just didn't see where the A25K Pot goes for Gain?

also is there a link anywhere that has all those input like LFO and everything else like the first pictures in this post?

i got the whole board plugged up, waiting on me to put in wires ... thanks!

[Taylor]

All the documentation is at the website in my signature.

The pot would replace the trimpot above the opamp.

Adding expression jacks is like adding them for any pedal - I think there should be diagrams out there. You just use a switching jack to either have the pot or the expression pot connected. The wiring will be different depending on how your expression pedal is made.

[Ultrakd]

Hey I cant find any 22k timpots on Small Bear. Should I get 20 or 25k timpots?

[Barcode80]

Hey I cant find any 22k timpots on Small Bear. Should I get 20 or 25k timpots?

25

[Ultrakd]

I ordered my bored and my parts are on the way

[dfine22]

Hi, Building the TTT and wanted info on the LED.  The LED on the board and the one which is wired to the 3pdt signifies the rate. Correct.? if so,  how would the on/off LED be wired to the switch.  I generally use a different wiring for the 3pdt.  Also could I just wire the LED to the board directly and bypass the footswitch? Thanks

[Taylor]

Yep, you can wire the rate LED straight to the board, then use standard 3pdt wiring for another LED.

[Jamforthelamb]

Hey Taylor,

Sent you an email, and a PM about my order. Did you get them?

Thanks!
Kevin

[Taylor]

Hi Kevin, Pm replied.

[dfine22]

Hi, One more question regarding the pot orientation.  The wave distort is self explanitory however the other pots are not indicated.  I mounted the tempo, waveform and the multiply board mounted and underneath the PCB.  From what I can gather that is wrong darn it.  I may have to desolder (yuk) and reinstall.  I am at a standstill.  Please help. Thanks

[Taylor]

There used to be a photograph showing the orientation, but it seems to have disappeared. The pots should go on the underside of the board, but pointing up so that they are not obscured by the board. I'll post a picture today.

But it also seems worth mentioning that a lot of my DIY pedals over the years have had backwards pots, and that never really bothered me personally. 

[dfine22]

Yeah, I screwed up,  I may be ordering another board as I will most likely end up pulling up a pad etc. Shame as I was going great until now.  I even decaled the enclosure to fit the wrong configuration. Se la vie.  

[Taylor]

Ok, check this post:

http://www.diystompboxes.com/smfforum/index.php?topic=84109.msg700055#msg700055

For the tremolo, it's the opposite of the two ways shown for the EB. So the pots go on the back of the board like the bottom photo, but pointing upward like in the top photo.

Removing pots from a double sided board without pulling the pads up is quite possible - I have done it many times without messing up the board. Just flow a lot of solder onto and into all the pads. Then heat one pad up so that it's fully molten all the way through and pull that end up, then do the center and it should pop up on its own. Then do the other end. Continue that way and get each leg out individually. Then use a solder sucker or braid to pull all the excess solder out of the pads before soldering it in the other way.

[dfine22]

Thanks, I didn't think to pull one pad up at a time.  I got them off anyway.  I have regular pots (non-board mounted) and have already soldered the pots on.  We'll see. I wish that I wasn't so impulsive sometimes

[Jamforthelamb]

Chip and board came on Saturday. Once I get my bench a little more clear this is going to get my full attention. I'll post my results

-Kevin

[Ultrakd]

I got my pcb board today.. I wasnt able to find how to add a expression jack to the pedal though. Does anyone have any links as to how to do it?

[Barcode80]

get a switching jack, wire the 3 wires of the pot you want to control from the wire to the switched side (usually 1-2-3 goes to Sleeve-ring-tip respectively), and the corresponding 3 wires from the other side of the switching jack back to each correct pad hole on the PCB. This way when nothing is plugged in, the switching jack stays closed and the pot is engaged. When you plug in the expression pedal the switch contact is broken, so the pot is out of the circuit and the pot in your expression pedal replaces it.