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DIY PCB (motor driver for tennis machine)
After etching and cleaning off of protective toner and Green TRF
As the electronics hobbyist one of knowledge that we have to be familiar with is how to make our own printed circuit board (PCB). Making our own simple single side PCB actually is not require a sophisticated technique and technology as you might think, instead most of the required materials is already available at your home. For more information please visit www.ermicro.com/blog/?p=1526
Here's a completed pair of the etched copper earrings I've been making.
You can't quite see it here but there's a thick layer of hardened clear coat protecting the face.
more info @ narbotic.net
and available for purchase on Etsy:
Early attempt at designing PCBs using ExpressPCB. The green is the back of the board, the red is the top, and the yellow is the silk screen (in case I can find a cheap enough place to make me a small batch).
I'm bummed to report that my second round of prototype boards for my next kit upgraDDe (a battery charger) has turned into a redo. I was off on the drill size for many components. Actually I think I had the sizing right, but the barebones boards have been known to be off. The next round has been ordered with extra drill space for the pins.
tektronix 2465b pcb
this board (and the whole scope inside) seems to be in good shape. it looks like it was a california unit, with no rust at all. some units I see have rusted screws and nuts, but this one is totally clean. cars out in calif also have no rust on them (usually) whereas east coast cars end up being rust-buckets in just a few years.
the seller was in san diego and its not too likely that he had it shipped very far. it made a short trip up to me, in the san fran bay area.
A closeup of the back of the PCB and the three swtiches that are affected by the pulled pad. "-", "[" and "'"
From Dirty PCBs dot com. Dirt cheap, better than adequate quality, simple ordering, good web feedback, any shape you like, the panelising that enables and dirt cheap, yeah really dirt cheap... Which means you give your imagination a chance for minimal risk. One of these panelised boards was more of a rushed test than the other and having received them in the flesh I can instantly see how I might have done it better. But the total order price was $25 for 10 10x10cm of board, which I fit 2 boards into panelised. So it was $12.50 to experiment, get 10 functioning boards and a powerful experiential lesson. That's the real value of dirt cheap. Then there's the other 10 boards that I couldn't be happier with... for $12.50. My next order is already in...