ez-250

[bluebunny]

Finally got round to putting this in an enclosure:



Sounds great!  Thanks for the neat design, Joe.

[bluebunny]

@Jim: btw, I just went with the 12K bias resistor in Joe's original schematic.  I've not even tested the voltage.  Very unscientific.  But sounds great to me!

[Mustachio]

Looking awesome Marc! Well done! Like the Ez rider theme!

Just after I was working on this I redrew the pcb to be correct and then......Boom major computer problems , running my os and most of my important new work files on 2 ssd drives running in raid stripe 0 . So I had to do a little work to recover everything and get reset up.

Good news is I saved the pcb work for this and all my other projects So ill post a revised version with the corrections that should bias as it should around 12k.

I thought it sounded really good like a mild OD that still had a lil pepper . I think I put a compressor or something with a buffer in front of it and it really made it come alive. Thinking about redrawing with a simple buffer at the input , what do you think ?

[bluebunny]

Thanks Jim.  If I'd planned the graphics a little better (i.e. "at all"), I would have put the LED into the headlamp as Rob suggested in another thread.

Boom major computer problems

Bummer.   

I'll give the compressor a go - I have a Bear Hug and an Engineer's Thumb I can try.  Sounds like a good idea.  So far, I've only tried it out "naked".  If you try out the buffer, let us know how it goes.  I guess it can't hurt to try.

[Bill Mountain]

I was thinking about building this.  Does anyone have the schematic?  The links seem to be broken.

Thanks!

[Bill Mountain]

Last try.

[bluebunny]

So long as Joe doesn't object, I'll see if I can find a copy when I get back home and post it later.

[Mustachio]

Yeah I was looking for it too, I had hard drive crash right after I made my board for this project. I remember recovering most of my work but I can't seem to even find my pcb project file. But this is such a small circuit reworking a schematic from this thread should be easy enough. I think I had a resistor after where it should have been and would be an easy fix. Mine still worked I just needed a larger resistor to bias the transistor to 4.5v.

If bunny can't find it I'll try to draw something up, if Joe doesn't mind. Not sure if he took it down for a reason.

[bluebunny]

Found it!  Not where I was expecting it, but here it is:

  <-- click!

Hope Joe doesn't mind it being re-posted here.  It's a cool little circuit.

[Damaraja]

I am digging this circuit. Played around with a variety of transistors (and tone circuits). Most sounded good (similar), but I stopped at Q1: BC109C, Q2: BC107A. Will probably resume transistor swapping when I can crank her up, but I would gladly settle on this configuration. Another great contribution from Mr. Davisson. Much respect 🙏⚡️🤙