How many DIP IC clips do I need?

[parism]

Unless you're trying to look at more than 4 channels with a scope that has a built-in logic analyzer, you don't need clips.

Just make yourself four test leads, that have a grabber hook on one end, and a micrograbber on the other. Clip the scope probe to the grabber hook, and use the micrograbber to grab specific chip legs. They are small, and are designed to grab individual chip legs. And they will make better contact with rusty chip legs, like a lot of the ones found on these boards.

I posted all of the materials (hooks, micrograbbers, and wire) with links in another post here the other day. Here ya go:

Battlezone Playing Blind (Vector Generator?)

The scope settings for probing pin 7 at A10/D10 should be the same as probing the XOUT/YOUT test points on your Asteroids. I just leave my scope set to the same XY settings for everything. You should normally just see a slightly smaller version of the image at A10/D10 than at XOUT/YOUT, when...

forums.arcade-museum.com

Note that these leads have other uses as well (like when you need to ground a specific chip leg to ground or another test point, when doing signature analysis.) So they are worth making. And if you make them yourself, you can make them whatever length and thickness you like. I use 28AWG silicone wire, so they are thin and flexible.

View attachment 716318

I usually go for these



If you go that way, don't get generic cheap ones, stick with HP.

p

 

[braedel]

Whenever you think you have enough, get backups for them..lol


~Brad

 

[andrewb]

I usually go for these

View attachment 716390

If you go that way, don't get generic cheap ones, stick with HP.

p

I used to say that too, and yes the HP ones are definitely the best in the game. (I also used to say only go with Pomona grabber hooks, as those are the best there.)

But recently China has stepped their game up a bit. The parts I linked to are nylon (not that cheap shiny plastic that breaks), and are pretty good for the price. The micrograbbers are not quite as nice as HP, but they're really good for the money. I've been using them regularly, and they hold up pretty well.

 

[parism]

I used to say that too, and yes the HP ones are definitely the best in the game. (I also used to say only go with Pomona grabber hooks, as those are the best there.)

But recently China has stepped their game up a bit. The parts I linked to are nylon (not that cheap shiny plastic that breaks), and are pretty good for the price. The micrograbbers are not quite as nice as HP, but they're really good for the money. I've been using them regularly, and they hold up pretty well.

That's great to know Andy, thank you, I will grab some as you can never have too many of those…

p

 

[HudsonArcade]

I've got a bunch of 24/28/40 pin ones I never use if anyone's in the market

 

[toledoflyer]

I've got a bunch of 24/28/40 pin ones I never use if anyone's in the market

Are any of them 3M and standard smooth pin (not nail head)? If so I'd definitely be interested.

 

[cwilkson]

Are any of them 3M and standard smooth pin (not nail head)? If so I'd definitely be interested.

Me too.
Can never have enough!

 

[HudsonArcade]

Some of the APs are gold... some are nail head.
Blues and 3M are all straight.

I count:

40 pin = 13x
36 pin = 1x
28 pin (600mil) = 11x
24 pin (600mil) = 6x
22 pin (400mil) = 7x
28 pin (300mil) = 6x
24 pin (300mil) = 12x
20 pin = 10x
18 pin = 8x
16 pin = 3x (+ 1 oddball 600mil?)
14 pin = 3x
8 pin = 6x


I'll keep a handful just in case, but feel free to make offers (preference to bulk buyers)

 

[NivagSwerdna]

For a scope only you probably don't need clips at all since you are only fighting a few wires at a time. For the scope you just need some grabbers and my scope probes have that already.

For logic analysers you do need clips for your own mental health. The mean time between falling off of wires is low so it's hard to keep many wires in the same place at the same time. In fact grabbers and logic analysers is the short route to madness.

Now for a logic analyser you really have two options... Nail head clips that you attach your grabbers to... Very handy if you have a decrepit boat anchor analyser with fancy HP grabbers... Or straight pins which you can attach a female end of a Dupont connector wire to.

I have a cheapo logic analyser 16CH which is permanently wired to a 16 pin clip. GND goes in the bottom left corner. You can then move this arrangement around most 300mil 14 pin and 16 pin devices. That arrangement gets you a long way and reduces the madness.

Where geometry is tight you might not have the headroom for a 16pin clip on a 14 pin device.. so you might want to consider that as well although it's probably a luxury item.

After a while you will start to wonder about ROMs so then you are looking at 600mil clips with 24 or 28 pins... 28 only if the geometry allows. Straight pins for Dupont, nail for grabbers.

And eventually you might care about CPUs which brings you to 40pin 600mil clips.

Buy a 16pin 300mil straight pin one, some Dupont wires and a cheapo 16CH logic analyser to get started.

Share & Enjoy

 

[toledoflyer]

Some of the APs are gold... some are nail head.
Blues and 3M are all straight.

I count:

40 pin = 13x
36 pin = 1x
28 pin (600mil) = 11x
24 pin (600mil) = 6x
22 pin (400mil) = 7x
28 pin (300mil) = 6x
24 pin (300mil) = 12x
20 pin = 10x
18 pin = 8x
16 pin = 3x (+ 1 oddball 600mil?)
14 pin = 3x
8 pin = 6x


I'll keep a handful just in case, but feel free to make offers (preference to bulk buyers)

View attachment 716931

I can't use any of the nail head (they don't work with my logic analyzer probes), but I'll buy all the straight AP and 3M you want to group together for a reasonable price. (just let me know what you are looking to get and how many of each your including)