Logic Pen Kit

Name: Logic Pen Kit
SKU: 7606
Price: 14.00 USD
Availability: InStock
Rating: 4.33 (10 reviews)

(10 Reviews)

A logic pen kit that shows also floating signals and 100 ns glitches

Designed by jdn in Switzerland

2016-06-26T19:55:42.577Z-LoPenKitRaspi.jpg

2016-06-26T19:55:42.577Z-LopenKitUno.JPG

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Swiss design - small is beautifull

A logic pen kit that shows also floating signals and 100 ns glitches

A logic pen shows zeros and ones. That one shows also floating signals and 100 ns glitches. The HCmos circuitry includes 2 one-shots to enlarge also high frequency signals. Good if you have a logic a…

You do not like to solder? See our Mini Logic Pen. 10x60mmin size, tested.

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Quantity	Price
1	$14.00
2+	$10.00

Review Breakdown

Average Ratings

Product: (4.50)

Documentation: (3.90)

Shipping: (4.50)

Communication: (4.40)

Marton | June 18, 2021

Nice stuff!

Arrived very quickly. Easy to assemble (a few small inconsistencies in the instructions but you can figure out) and works well. Can recommend it :)

João Pedro | Feb. 15, 2021

Good simple logic probe

A simple to build and cheap logic probe. The stencil on the board is easy to read and the whole thing is simple to solder. The only issue I found was that the Green LED (constant current) lights very very dim (I suppose that it is a problem with the resistor that limits the LED current). The only enhancement I could imagine was a simple buzzer to complement the LEDs functionality. Overall I recommend this product and the seller (which resolved a problem with delivery of the package swiftly).

Reza | Dec. 23, 2020

Great product

Much more convenient than other methods to quickly verify circuit operation. Highly recommended. I swapped red and green led and the associated current limiting resistors. This made more sense to me, red is high, green is low.

Laurentiu | Dec. 10, 2020

Super useful tool

Thank you for the postcard, it is beautiful! It took some time to arrive in Canada, but it's not the seller's fault and it worths the wait. I assembled it in no time, checking all the parts on my testers; all were good. Got a bit of trouble realigning the IC's pins and I managed not to break any of them. Because I intend to use the probe for old 8-bit computers with LS chips, I was a bit in doubt if the HCs will match the logic levels, therefore I installed the chips on sockets to be able to replace them with LS or HCT. The finished board is installed in an Epipen case which is perfect for the purpose. I can easily take it out by removing a screw.
Overall I'm very satisfied with the probe and I'm sure it'll help me in my troubleshooting. I would have a piece of advice for the seller about his future shipping: attach the chips directly on the PCB in their normal position and bend only two pins to keep them in place. The foam can be stuck under the PCB and fastened with a rubber tie. In this way, you can avoid the chips' pins being damaged on the way to the customer.
Highly recommended!

Jan | June 24, 2019

Very useful and practical tool

The kit was shipped very promptly, and arrived as expected. The documentation didn't yield any surprises, and pointed out the tricky bits. Easy to solder (except perhaps the pointy point).

Functions as expected, reacts fast, and I really like that it also shows 'floating' state.

Wayne | Aug. 13, 2018

NOT GOOD, TERRIBLE

The schematic, pictures,and instructions were all different from the actual PC board. Nothing agreed and didn't work. Big disappointment!

Response from jdn | Aug. 15, 2018

Well, you did not get a bag that was corrected: yes, the indication for the led is wrong, sorry..
Beside this, the schmatic shows thes^hottky diodes in serie and this was replaced by one standard one. Anything else?
Cordially JDN

Adrian | Nov. 15, 2017

Works fine, but silk screen and documentation not accurate

Very quicke delivery. The documentation shows a version slightly different from the shipped kit. The kit's silk screen for the LEDs is misleading (but correct on the documentaton): Try an intuitive interpretation of the silk screen and the solder the LED just the other way round. The silk-screened 4K7 resistor has been supplied as a 10k, but this does not seem to impair the function. The suppplied cable is just a bit too short to be useful. After these initial obstcles the logic pen performs as expected.

Daniel | April 6, 2017

Is exactly what it is intended to be

The kit is mostly clear and easy to assemble. As another reviewer mentioned, the polarity of the LEDs could be clearer. There is a little note about how the silkscreen image has one side smaller than the other to indicate polarity. Changing that marking to stand out better would be nice. However, that pretty much is just a nitpick that stands out because the kit in general is super easy to build and well marked. I've never learned to read resistor color bands, and the instructions even went to the detail of listing out which color bands are for what resistor. Very well done!

I can think of various tweaks that would make it more useful such as being SMT or having a built-in battery but those would go against the point of an easy to assemble kit. It currently fits perfectly into being both a kit to build and a useful tool

I highly recommend this kit. I've often encountered cases where I needed to check a signal on an output pin that isn't connected to an LED. Before this kit it involved hooking up a multi-meter, scope or logic analyzer. None of these provide the nice simplicity of just a LED output. So I think this fits in quite well alongside my tools. The price is excellent too!

Josh | Aug. 15, 2016

Great little logic probe

This is a fast easy build and it works just as advertised. It's well designed, with a nice PCB and all parts needed. I used a little longer wires for the power. It has a nice breakout (3 male header pins) in case you want to use some other wire/probe.
the logic probe is small and easily fits in a shirt pocket, a bit of kit you can always have with you. The led's are bright and well placed.
Communication/support is awesome.

Well worth it.

John | July 13, 2016

Inexpensive kit that is fun to build and useful

Great communication from seller when I placed my order. This is a fun and easy to build kit that is super useful for $9.

The led polarity on the pcb wasn't as clearly labeled as I would have liked but otherwise a quick & simple build. The IC pins were a little beat up from shipping but nothing too difficult to sort out.

Thanks!

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