Products > Test Equipment
Low cost logic analyzer probe for Rigol MSO5000 EasyEDA project
S. Petrukhin:
By the way, the LVDS chip is very small. For complex environments where there are requirements for protection against interference, it is possible to embed this chip directly into the tip of the probe and transmit a stable LVDS signal directly from the spot.
yelworc:
I was on the hunt for nice probes to go with this,
Dream source seems to be a good bet.
https://www.dreamsourcelab.com/shop/accessories/shielded-fly-wires/
I'll let you know about the compatibility
There's also these if you want dirt cheap
https://www.aliexpress.com/item/33060152163.html?spm=a2g0o.productlist.0.0.350bd45aRmKXPk&algo_pvid=6ace0999-564b-4c96-a24d-4ea97aea9a24&algo_expid=6ace0999-564b-4c96-a24d-4ea97aea9a24-26&btsid=0bb0624116145943214698372e4b06&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
S. Petrukhin:
--- Quote from: yelworc on March 01, 2021, 11:25:11 am ---I was on the hunt for nice probes to go with this,
Dream source seems to be a good bet.
https://www.dreamsourcelab.com/shop/accessories/shielded-fly-wires/
I'll let you know about the compatibility
There's also these if you want dirt cheap
https://www.aliexpress.com/item/33060152163.html?spm=a2g0o.productlist.0.0.350bd45aRmKXPk&algo_pvid=6ace0999-564b-4c96-a24d-4ea97aea9a24&algo_expid=6ace0999-564b-4c96-a24d-4ea97aea9a24-26&btsid=0bb0624116145943214698372e4b06&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
--- End quote ---
Here published a list of the materials I used: https://www.eevblog.com/forum/testgear/low-cost-logic-analyzer-probe-for-rigol-mso5000-easyeda-project/msg3344750/#msg3344750
I made myself tails for the probes from thin silicone wires very soft. The probes you found on Aliexpress use an ordinary PVC wire that is very hard.
justanothername:
I ordered the PCBS of this they came today. Thank you for this.
Two remarks:
Firstly the groundplane is only on bottom and hatched. There is no technical reason to make it hatched. Better use a solid plane on both sides.
Secondly, and this is way more relevant, the plane is not connected to the probe ground. It is floating. That is not a good idea in my opinion. Better connect it to GND or do not use a plane at all.
This weekend is assembly time and testing.
S. Petrukhin:
This is a two-layer board, there is no free layer for solid fill.
Using a grid in a polygon is just as good for shielding and removing static electricity as a solid fill, but the grid has many times less capacity to the tracks.
However, it is not a shielding layer and it is not connected directly to the Gnd, but neen connext to PE, because its task is to remove static charges, it is connected via the resistor R18 and the capacitor C5.
I chose bad nominals just to avoid creating new positions in BOOM, But this is not essential. It is best to use a 1MOm resistor and a 100pF high-voltage capacitor there.
If you wish, you can close R18 and get a grid rigidly attached to Gnd. :)
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