[799] via coreboot wrote:
Do you have any recommendations if it makes sense to invest a bit more budget and buy a more expensive clip or will the quality be the same?
The Pomona 5250 Clip: https://www.tme.eu/gb/details/pom-5250/test-clips/pomona/5250/
I have no idea about the clip you used before, but the Pomona 5250 plastic compound is not very hard and contacts are not very robust, so after some (ab)use it will certainly also wear out.
These clips are test tools for occasional use, not development tools.
You can obvioulys use them for development anyway, but keep in mind what they are designed for, so that you have the right expectations.
//Peter
On Wed, Oct 18, 2017 at 3:35 PM, Peter Stuge peter@stuge.se wrote:
[799] via coreboot wrote:
Do you have any recommendations if it makes sense to invest a bit more budget and buy a more expensive clip or will the quality be the same?
The Pomona 5250 Clip: https://www.tme.eu/gb/details/pom-5250/test-clips/pomona/5250/
I have no idea about the clip you used before, but the Pomona 5250 plastic compound is not very hard and contacts are not very robust, so after some (ab)use it will certainly also wear out.
These clips are test tools for occasional use, not development tools.
You can obvioulys use them for development anyway, but keep in mind what they are designed for, so that you have the right expectations.
Pogo-pin adapters are little bit more robust but they would require holding arm and they require precise pin positioning while clip grabbers do most of self-adjustment job. AFAICS SOIC-8 variants are available on eBay at this moment.
On Wed, Oct 18, 2017 at 12:35:11PM +0000, Peter Stuge wrote:
[...] These clips are test tools for occasional use, not development tools.
Do you have a recommendation on better clips? The Pomona seems to last for a few months due to my above average number of clips. The 3M is much worse and the hard spring worries me everytime it jumps off the chip.
(I was considering setting up a monthly subscription of SOIC-8 clips, although now I need to add the SOIC-16 to my list)
Trammell Hudson wrote:
On Wed, Oct 18, 2017 at 12:35:11PM +0000, Peter Stuge wrote:
These clips are test tools for occasional use, not development tools.
Do you have a recommendation on better clips?
I don't. I was lumping all clips together. I've used the Pomona and a low-cost noname variant. The latter is more rigid but has less precise contacts and doesn't have open "sides" like the Pomona one.
A development setup will have to involve some soldering onto the chip.
I usually wire a small pin header to the flash chip on mainboards that I want to do development on.
//Peter
On Wed, Oct 18, 2017 at 03:22:44PM +0000, Peter Stuge wrote:
[...] I usually wire a small pin header to the flash chip on mainboards that I want to do development on.
Check out the Lenovo X3550-M5 mainboard:
https://www.flickr.com/photos/osr/37497785771/in/photostream/lightbox/
ZIF socket for the SOIC-16 flash, a 6-pin programming header and a silkscreen label identifying the function of the flash chip. The BMC and PCH flash chips have similar headers and labels (but not the ZIF).
Hello Trammel,
(I was considering setting up a monthly subscription of SOIC-8 clips, although now I need to add the SOIC-16 to my list)
I like that idea, I think I'll just choose a cheap one and in case it breaks I just use another one. Still a shame, that no one is building a "premium" clip. The cheapiest one I found: [http://www.ebay.de/itm/SOIC-8-SOP8-8-Pin-Test-Clip-Test-Clamp-Testing-Progra...) => 1,99 Euro no shipping costs, WTF?
[799]
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[799] -
Andrey Korolyov -
Peter Stuge -
Trammell Hudson