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replies interleaved. The other side does not become a waste of space with more complicated circuits.? Nor, if you're doing high frequency digital stuff, is the idea of a ground plane on the back a

Mark, That is a clever idea to turn a drill press upside down. Bertho From: [email protected] <[email protected]> On Behalf Of Mark Lerman Sent: Thursday, November 12, 2020

A little late, but this is my solution to accurate pcb drilling < https://www.instructables.com/Motorized-Plunge-PCB-Drill-Using-a-USB-Microscope/ > Mark

Thanks for the info Harvey. Great. Even though SMT uses less space and I could do multiple paths on one side, I see the other side a waste of space. You are correct as this will not affect me.

The answer is a qualified yes.? Most circuits use top and bottom parts with vias as needed. However, you need to consider that the two circuits are going to be less than 1/16 of an inch apart, and

I was thinking...my next pcb will be simple but will be all SMT components for my first time. I was curious if it is ok to put one circuit on one side of the 2 sided boards, and another on the other

I used a mini air die grinder 1/8” collets perfect for PCB carbide bits and the right RPM 56,000. Only $27 at Harbor Freight. I bought mine about 30 years

I did put a transparency over the screen, laser printed one.? I have the plans for a video crosshair generator in the works, which would be much better.? The camera is an old security camera which

Yes, I see from the photos that they are in principle much the same. A spinning drill bit that can be raised and lowered, a place slide the pcb around in any direction to reach each of the holes to be

That, and I couldn't do plated through holes (the chemistry seemed excessive).? SInce I was doing 100 pin TQFP (0.5mm spacing), depending on whether or not I got the toner transfer exactly right (and

That sounds very familiar! Bertho Sent: Sunday, November 8, 2020 10:54 To: [email protected] Subject: Re: [homebrewpcbs] Drill precision holes without CNC, was RoHS question Thanks.

Thanks.? Linear rail platform, linear stepper, stopping points are settable (in use).? Worked well until I started making PC boards that were too complicated to produce here. Harvey

Nice setup! Sent: Saturday, November 7, 2020 23:44 To: [email protected] Subject: Re: [homebrewpcbs] Drill precision holes without CNC, was RoHS question We're talking variations on a

We're talking variations on a theme. Mine seems to be more elaborate, but then again, I could throw stuff at it. /g/homebrewpcbs/album?id=86511 Harvey

"The registration holes need to be exact, which is why I made an upside down drill press, which is far more accurate (no parallax)." I used a different technique to get the same benefit. FRP boards

When I made double sided boards, I didn't do electroplating, but did epoxy the top and bottom boards together.? The registration holes need to be exact, which is why I made an upside down drill

Electroplating after applying a resist is a good idea. That'd work just fine. I was never keen on ammonium persulphate, as a cheapskate hobbyist the mixture didn't last, unlike ferric chloride that

It may have gotten more expensive over time.? It was about 30 USD for a pint the last time I bought it, and it does have some nasty stuff in it.? It does work well on a clean board, though. One

I sometimes use soldering tweezers to solder parts. The trick is to use your tweezers to hold down the part (one tine of curved tweezers works well) after tinning & fluxing both pads. Gets harder as

I never tried tin plating PCBs, from memory the stuff was expensive, hard to get and went "off" quickly. Seemed like a lot of hassle for little reward, I just sprayed boards with clear lacquer. Out