Products > Test Equipment
DIY Logic Analyzer Probe and Pods for Siglent (and LeCroy) scopes
Johnny B Good:
Season's greetings to one and all.
I've been following this thread from its beginning. I've not as yet committed to building this rather fine DIY version of the siglent spl2016 until I came across this eBay seller, atomicfrenzy, selling the following diy kit here:
https://www.ebay.co.uk/itm/224681365190
Being able to buy all the required parts (but with only 8 test hooks) in one go makes the project so much easier for me to complete than if I'd had to order them separately. I'd have bought the official logic probe kit but the idea of spending as much as the current price of my three year old SDS1202X-E on what is essentially a bunch of cleverly wired connectors with a handful of smd passive components seems somewhat obscene to my mind, hence my interest in going the diy route, even if I'm cheating a little.
I messaged the seller, originally just to ask if he could supply an additional pack of test hooks, but noticed cheaper item and shipping charges pricing at the top of the message form so I have asked him to clarify the pricing details before I place my order.
I'll let you know the resulting answer all in good time. :)
oz2cpu:
hi john, it surely looks like 99% "my" pcb designs, and 99% my 3D case designs
and like i allready said : the design files are all free to make, use,
and to sell at part cost, what this seller does is exactly that, so far i am happy.
however i am a little bit nervious about the flat cable implementation,
all the tests we have done, was with carefully twisted pairs (gnd and each signal)
yes it is a hazzle to make,
if you dont expect to use it, at its maxium potential speed,
it might not be a practical issue for you.
ONE EXTRA IMPORTANT NOTE : the main pcb MUST be 4 layers !!
the ebay design looks like it is modified to be 2 layers !! the layer identifier is modified so it is hidden, to see the two inner layer numbers !!
you need to have this confirmed before purchase !!
this is a rist that happens, when some one "copy" and modify designs..
Johnny B Good:
I'd already placed the order by the time I was alerted to your message. I have just messaged atomicfrenzy asking him to confirm that the main PCB ('scope connector) is actually a four layer board.
I'm expecting a fairly swift response since he'd replied within 12 hours of my initial query over pricing and an additional set of test hooks.
I'll post the result of that communication asap.
Regarding the use of flat ribbon cable, I was already aware of the problem (from the discussions in this thread). I took the view that this was an upgrade I could apply as soon as I could source suitable micro-coax or twisted pair ribbon cable.
He'd made it quite clear in the description that the kit had been designed for use with such cable and posted test results with the supplied 24 inch lengths of Belden ribbon cable so I was happy enough with the essential parts of the kit being supplied, based on the assumption that these were in fact based on your board designs as he freely admitted in his first reply.
Hopefully, he can confirm the use of a 4 layer board for the 'scope connector end and all will be fine, otherwise I will be cancelling the order on the basis that it is 'not as described'.
oz2cpu:
SUPER, if the main pcb is 4 layers, the copy design is done in error, and should be corrected, the layer identifier MUST reveal the inner layers
if it is 2 layers, you be better of cancel the order, and order the pcb from jlc
the correct files, that works are free (why the heck edit them the first place ??
Johnny B Good:
I've just edited my previous reply, BTW.
Regarding his 'editing', this might simply have been to enable 'panelising' of that board to minimise costs (a close look reveals the 'mouse bites' on the main board which he had pointed out to me in his initial response). Hopefully, this is the only reason why he edited the original design. I guess I'll find out one way or another soon enough.
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