Is your I2C bus not ACK'ing the way you expect? Do you need to discover a UART's mysterious baud rate? Or do you want to reverse engineer an SPI protocol? These all sound like jobs for a logic analyzer! With the growing ubiquity of UART, I2C, and SPI sensors, logic analyzers are becoming a tool everyone needs in their toolbox or on their workbench. This 8-channel USB Logic Analyzer with support for sampling rates of up to 24MHz provides a good while economic option making it a great tool for quickly diagnosing most communication issues we encounter.
These analyzers will work with both 3.3V and 5V systems (up to 5.25V max and 2.0V minimum on a high logic-level) and is powered via an included mini-B USB cable. This logic analyzer works with PulseView -- an open-source, cross-platform signal analysis software suite.
The analyzer ships with Female-To-Female jumper wires. If you're using an Uno or board with female headers we recommend picking up a handful of Male-To-Male jumpers to connect the analyzer to the female headers.
NOTE: On some units the GND connection that's adjacent to input 6 isn't actually a ground, it appears to be some sort of clock signal. We recommend not using that pin for anything just to be safe.
If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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Based on 14 ratings:
1 of 1 found this helpful:
I installed PulseView on linux, it does what is expected. I'd recommend getting a male/female wire with it so you can use it on a proto board more easily.
Not having any luck loading drivers. Program was crashing on startup, loaded C++ to fix that, now it doesn't find the device drivers. Zadig doesn't seem to help. Windows 10 64 bit laptop. PK
I'm old enough to remember budgeting $40k for a 2nd-tier logic analyzer--having one at home is just unreal to me. Don't debug hardware without it. You will want to buy the Bus Pirate cable (https://www.sparkfun.com/products/9556) to go with it--it's much more convenient to have the single connector to plug into the logic analyzer than fiddling with 10 individual cable ends.
I've used this to reverse engineer a three wire SPI protocol and inspect an I2C bus. So far it works exactly as advertised. Using the PulseView software with it is very easy and straight-forward. Overall I'm very impressed with what you're getting for the price.
For $20, how can you beat this? I was trying to debug an SDIO interface between an MCU and uSD card. This thing combined with the open source PulseView software, and voila, I got tons of insight into what's going on. Even at just 24MHz, this is fine for most of the projects I'm working on. I highly recommend it!
Received my logic analyzer yesterday and checked it out this morning using PulseView to read PWM signals from my Teensy. Unfortunately, I was able to determine that channels 1-3 weren't reading at all. I don't need the full set of 8 channels so I can make do, but it's still disappointing.
It sounds like you received a defective unit! Please send a RMA request and we can get that fixed for you.
Very much plug and play. Installed pulse view on ubuntu 18.04 (linux) Installed the driver package Plugged LA into UART application Works well.
I own a number of Saleae logic analyzers and wanted to try this out for kids to use to learn and debug I2C, Serial, SPI, etc... I didn't expect much from it as other inexpensive logic analyzers I've looked at were disappointing.
I also expected Pulseview to not work that well given it was free. I expected it to be hard to install/configure/etc.
Just the opposite... Installation was a breeze and performance was excellent. Recording millions of samples didn't tax the analyzer nor my PC.
The ONLY issue I dislike is the wiring. It seems silly to use female/female wires on this thing but I understand they are just trying to keep the costs down. Other people recommended purchasing the bus pirate cable adapter and if you don't mind the $5 it is probably worth it. https://www.sparkfun.com/products/9556
I've wanted a logic analyzer forever and in the past few years, the price of some had become quite reasonable. Still I hadn't found myself in a position where I absolutely needed one, and so I hesitated to buy one. I hadn't noticed this little gem on SparkFun's site until this came up as a "Deal of the Week" in May, and as soon as I saw it I ordered it! For less than $20, how could I loose? Setup fairly simple with the help of SparkFun's "Using the USB Logic Analyzer with sigrok PulseView" tutorial, and after setting up a little Arduino sketch to generate some signals to put this thing through its paces on all 8 channels, this thing is absolutely amazing! I'd have been happy with this device had it cost a hundred bucks, and for only $15, I'm astounded! Highly recommended!
Once you get this little guy up and running, it works great! However, at least on my Win 10 machine, you have to mess with the Zadig app to install the driver and if you shut down and re-start it doesn't automatically re-connect. So, the driver use/installation is frustrating and not well documented, but the analyzer itself works well with pulseview and is worth the money.
I needed a logic analyzer for some data interception/debugging. Didn’t have to be super fast, or support wide voltage ranges. It only needed to work at 5V logic levels. Thought about going to the usual online flea markets to find a cheapie, but gave Sparkfun a look first. Glad I did. This isn’t that much more expensive, and it worked straight away with sigrok/PulseView. Once I figured out how to connect up to the PCB (I’m new to logic analyzers), I got the data I wanted on the first shot. Good stuff. 👍
I've used this to look at I2C signals from my Arduino. It's really easy to use. I chose a relatively high sampling rate and was able to capture it without trouble. Sigrok is a breeze to use as well. I really like their add-on a decoder option.
0 of 1 found this helpful:
Waited several days for this only to have wasted my time and money. Software and driver installation is a pain. Once I finally got the application to load and recognize the device after having to install the application and several drivers all separately, the "run" button in pulseview completes in fractions of a second despite having selected 20 kHz sample rate and 200k samples (which mathematically should take 10 seconds to run). And no data to be found! Garbage! Will be ordering a reputable product. Congratulations if this worked for you, but if you want a reliable product guaranteed to work and do not want to risk wasting money and more importantly time, do not bother with this.
I should have not expected much from a $20 logic analyzer, but I was still disappointed. The software was difficult to install ( MacOS Big Sur on MacBook Pro). Once installed (Pulseview 0.4.2) its OK except when it freezes which is often. The real bad part is that it will not capture any signal when the sample rate is set to over 12MHz. Not sure if this useful enough to keep.