From the comments on our earlier Turning the Freedom board into a Logic Analyzer post, Ralph Doncaster writes: For situations where the samples will fit in RAM, this is good. For long sampling periods I used a USBasp and a PL-2303HX to make a logic analyzer that can sample 2 lines at 2.4 msps or 8 […]
Alex from InsideGadgets has been working on a Building a CPLD Based Logic Analyser. In Part I of his post he details his build of a logic analyzer which saves the sample to external SRAM. For this project Alex used the Altera MAXII EPM240 development board with an on board 20MHz oscillator. The coding was […]
Here’s an interesting open source 200MHz logic analyzer project on Kickstarter, the DSLogic by DreamSourceLab: DSLogic consists of DSLogic-Core and extension modules. DSLogic-Core is a re-configurable circuit board based on FPGA technology with maximum 200MHz sampling rate and 64Mbit on-board memory. DSLogic-Core can work alone as a fully functional logic analyzer, along with various extension modules.DSLogic can also […]
Bob Davis has built an Arduino powered three Million samples per second six channel logic analyzer: In the video below you can see what the live display looks like. He is using a 74 series decade counter to divide down a 10Mhz crystal so that he has some nice fast stuff to sample. He experimented […]
Marcus is designing an 8 channel version of our Logic Shrimp. It features a PIC32 microcontroller driving overclocked SRAM chips for more then 20 MSamples/s. It’s designed to fit a 3cmx3cm PCB rendered above. Get a Logic Shrimp from Seeed for $35. Via the forum.
OPossum already designed a MSP430 LaunchPad logic analyzer based on our Logic Shrimp. In the latest update he decided to follow our lead in changing the 4 23K256 SRAM ICs for a single 23LC1024 IC. Preliminary design of a 4 channel version using the new 23LC1024 SPI RAM. Hope to find some time this weekend […]
Jon used TI’s SmartRF Protocol Packet Sniffer to reveal 802.15.4 wireless packet details: For the last several months my work with the XBee modules from Digi International involved using a logic analyzer to monitor the serial communications to and from the modules so I could measure the times between transmissions and view data streams as […]
This small 4 channel logic analyzer uses a ATmega microcontroller and a Nokia 5110 LCD. It’s able to capture signals only up to about 100Khz, but there is probably some room for improvement. This mini Logic analyzer is a tool for you to watch on LCD the logic transitions 0 or 1 of a digital […]
Helmy entered an 8-Channel 6MS/s USB logic analyzer into the Open 7400 Logic Competition. His device converts the 8 channel parallel inputs into a UART based serial signal. It outputs this serial signal to the input pin of a PL2303 USB-to-Serial chip which sends the data to the computer. Via the forum.
The longhorn Engineer I was so impressed by the Open Bench Logic Sniffer that I had to make a little mini review detailing its features. Get a Logic Sniffer for $50, with free worldwide shipping. Via the contact form
Dangerous DSO is a new logic analyzer/oscilloscope prototype we’ve been using in the lab. It combines a 16 channel logic analyzer with one 50MHz oscilloscope channel with +/-10volt DC range. The combined tool shows what your signal does between 0 and 1, which helps pinpoint noise and other electrical glitches.
We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service. This week we’re giving away two […]
The Logic Shrimp is a medium speed, low-cost logic analyzer with a USB interface. It can capture up to 256K samples at 20MHz, and is compatible with the open source SUMP logic analyzer client. The 23K256 serial SRAM from Microchip makes this project possible. Each chip stores up to 256K samples from one logic analyzer […]
Don’t forget to share your current project in the comments or the forum. This week our favorite project gets a free SOIC protoboard. Here’s a summary of major developments over the last week: The new forum is running, we hope you enjoy the added features of the phpBB software. It was a bit of a […]
Ladyada explores the Kinect protocol using a USB analyzer. While we know the Kinect has already been cracked, this is a good example of how USB analyzers can be a helpful (though costly) addition to a workbench.
Jack has a bunch of Open Logic Sniffer tutorial and testing videos at the Gadget Factory. There’s also a demo on YouTube, and a high quality screencast. The Open Logic Sniffer is currently available for preorder at Seeed Studio for $45, including worldwide shipping.
The most recent documentation is now on the wiki Openbench Logic Sniffer is an open source logic analyzer. It’s designed to support the SUMP logic analyzer software at the lowest possible cost. Download the source and design files from the Gadget Factory project page. This project started in the comments on a post. Initial circuit […]
Today we completed an initial PIC firmware for the open source logic analyzer. The PIC has two operating modes: a serial bridge for SUMP to talk to the client on the FPGA, and a ROM programmer that updates the AT45DB041D flash chip with new logic for the FPGA. There’s still some bugs, but the design […]
A few months ago we started working with the Gadget Factory to build an open source logic analyzer. After a very successful collaboration, we’re almost ready to order the first PCBs. Click here for a large PCB image [PNG]. The draft device has 16 buffered (5volt tolerant) input channels, and 16 unbuffered I/O channels on […]
Merve is working on an Arduino-driven logic analyzer design in the Arduino Forum. It uses logic chips to drive SRAM memory during acquisition, the Arduino then dumps samples from the SRAM via a shift register. We’re really interested in the result of this design. We once attempted a logic chip-based analyzer, but the design got […]