BugBrand wrote:Arrived today - the boards look fantastic!
Nice work Jason.
Will be a while before I have time to get on to building..
Edit - I took a break from what I'm meant to be doing and scanned over the 19-page thread (didn't take too long as many posts are 'me please'!)
Couple of questions - though I guess much will be covered by the forthcoming Build Thread.
- is the last BOM posted correct? [think around page 13 of the thread - there was one posted a few pages before]. Presuming that all parts refs on the board are accurate? They'll actually make building a lot quicker/easier.
I posted a newer BOM on the build thread. This is virtually identical, except I added a section for the Enhanced mode PCBs. The only difference to the PCB legend (at the moment) is C40. This determines the time before the envelope can retrigger after a note is released. It's tricky to explain, but it makes the synth react better with faster keyboarding or sequencing.
- wondered on the two mods boards - is there anywhere convenient to mount them? I saw in your pics that you had them flying with MTA headers. I guess there'll be space somewhere under the panel, but wondered what your thoughts were.
They're a bit of an afterthought. They will just fit under the panel at the top left of the board - stuck using velcro or sticky foam pads for example. As I suspect an enclosure will add space for a speaker, MIDI interface, what-have-you, then there'll be an opportunity to provide a mount-point.
- I was going to wonder how this works with low batteries, but, of course, it has the VReg to +5V.. hmm.. still, I wonder what a low-power circuit bend may do to the behaviour! eg. inserting a low value pot straight after the VReg.
Usually I've noticed the keyboard sensing goes strange, stops responding or mis-triggers. Also depends if you're using the speaker, and not the line out. Worth experimenting with.
Not a question - an observation - this seems like a really well done project! Big claps for Jason. I noted how detailed the schematics were (a great sign), but also the clarity of design & little things like options and the simple way to make the rear of the PCB front panel connect to 0V Gnd. Lovely stuff!
Thanks - I'm embarrassed now.
Of course the biggest shout should go to Chris Huggett and Adrian Wagner who designed and made the original Wasp 37 years or so ago.