Single-sided through-hole USBasp
Allgemein Februar 15th, 2011
shack member Michael built his own version of the famous USBasp by Thomas Fischl.
But it’s not just yet another USBasp implementation. This little gem is a true single-sided PCB without any bridges, all through-hole components and still maintains a very compact footprint of merely 55mm x 75mm.
This is a very easy to build AVR-programmer suitable even for beginners.
Simply grab the source for the project and start making your own!
It’s possible to make that thing even smaller
http://blog.dunkelstern.de/2010/04/26/usbasp/
(there’s a PDF with schematics and masks online too)
Ok i used two bridges, but it fits nicely into a AVRUSB MK2 casing (as mine was destroyed somehow)
yes, admitted, it’s not the smallest design, but given that there’s no bridges at all (which in itself is quite an achievement already) it’s definitely a neat design
No offense, it’s great if someone actually builds something himself without resorting to copying
Just jumped in because the “and still maintains a very compact footprint of merely 55mm x 75mm”
It’s not the smallest design i’ve seen (mine isn’t too, there are smd builds out there that are much smaller) so perhaps my design gives shackspace members inspiration for even tighter designs 
(As told in my blog article, i am better programming these things than doing the electronics, but i love to optimize
)
no offense taken
a layout optimization compo would be a fun thing to do some point in the future
Even though this is by far not the tightest design, I like that Micha has managed to complete it. Given his prior (non-) experience with electronics, I consider this quite an achievement.
After all, the point of all this is to get something done, which is usable and along the way it’s quite an exercise. It’s Micha’s entry into this field.
If I were to do it, I would probably write an optimization algorithm. Micha argues correctly that this would destroy the fun part of chip design for him, and that’s perfectly reasonable. With the lack of experience and automation it’s understandable that this board is not the smallest possible.
i see a lot of resistor bridges
working on my own usbasp board (different connector and switch layout) 