terminal posts / connectors for deadbug

There's a way to objectively evaluate enginering: people buy good electronics.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

They also buy a lot of electronics that isn't all that good. Sometimes because they don't know about better products, sometimes because there isn't a better product. Niche marketing is all about finding specialised markets where there isn't much competition for which you can quickly slap together a product which is barely adequate and sell it for a very high price.

If you genuinely have a new product, finding the customers who need it most and will pay though the nose for the pre-production prototype is an excellent way to get enough capital to pay for a proper development program.

You do have to be quick. As soon as an established company in the area gets a sniff of the market they'll whip together something competitive and try to eat your lunch.

Thank you for sharing your brilliant business insights.

You must be very popular and very wealthy.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

On a related subject, do you have any recommendations on what epoxy to buy and use? I.e., for ease of use, but hopefully not too expensive?

Check out Bondic.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Your capacity for perceiving business insights as brilliant is dubious - you are - after all - a gullible sucker for climate change denial propaganda.

I don't have as much money as my younger brother, but he did do a brilliant job organising the year 2000 Olympics in Sydney. If he's popular it's amongst a select few. Again, your judgment doesn't seem to be up to much.

for structural stuff "silver" paperclips are good.

If you use a connector that has a shell (like USB or DE9) you can often solder the shell to the board (or to paperclips etc)

some connectors have mechanical support pins that do not connect electrically.

sometime I push the end pind back throuh a pin header and solder them to the ground plane

This is an interesting idea, though one intuitively would want the resistance to be as high as possible. I did some quick Internet research to see how high I could go in resistance without the resistor getting expensive. I would think for my purposes a through-hole resistor would be more ideal, allowing me to solder on a wire and then still have room to clip a lead on, or what not.

I see that 10 megaohm resistors are quite cheap, of course. On mouser, through hole resistors up to a few hundred megaohm can be workably cheap, like 50 cents each at low quantities. The gigaohm resistors all seem to be quite expensive.

I wonder if one can get, in some form, a simple insulator with leads attached.

In that case the "resistance" would be set by whatever dirt is on the surface. Fingerprint residues contain salt and attract moisture, one might easily end up with an unreliable relative humidity sensor.

The resistance would be dominated by packaging and cleanliness.

Thanks for reading,

bob prohaska

you mean like lug strip?

In surface mount there are thermal bridge jumpers - which are insulators shaped like resistors, but not priced like that.

I have some 1T 0805 resistors.

Here's a 1G resistor:

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

I tries some aggressive sloppy flux and fingerprinting of a small PCB, measured on my Keithley electrometer, and couldn't resolve any leakage.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Instead of 10Mohm it is better to use e.g. 0.1pF SMD capacitors as standoffs.

Arie

Jeroen Belleman

Pad capacitance goes basically to ground, but that 0.1 pF can go anywhere you like.

I use 0.1-0.3 pF caps routinely in front ends, for controlling frequency response and injecting small signals.

Cheers

Phil Hobbs

Too small and too fragile. I usually use #26 stranded wire with a knot in it, secured by a loop of solid wire soldered to the ground plane.

Alternatively, a little rectangle of Cu-clad, glued down with cyanoacrylate, makes a durable standoff that will stand a lot of fiddling and soldering. Serrated-blade Wiss aviation shears are great for FR-4 because they don’t get dull—I’ve been using the same set for 30 years.

Cheers

Phil Hobbs

It's in the value range of parasitics. I've been known to use gimmick capacitors for such purposes, but maybe that could scare away potential customers in your case...

Jeroen Belleman

This

So I got one like this:

This is Manhattan style:

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Good idea.

We pay $0.008 for a 0.5 pF C0G 0603 cap by the reel.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics