pmdtechnologies gmbh - can you imagine Dual scope with ATTiny45 This submini USB scope is based on a Atmel Tiny45 cpu and cost less than 5€ with a homemade pcb It has 2 analog inputs and can supply 5V ont the 4 pins header on the right. One of the inputs can be scaled down with the trim pot. The firmware in the Tiny45 is written in C and compiled with Winavr and usb source code from obdev. As you can see, there is no crystal , the software sync the internal 16.5Mhz pll clock with the USB clock. The cost with a home made pcb is around 5€.Of course, do not expect 1Gs/s HID does not alow that data rate ! It has been designed to plug into a project breadboard so there is no need for a power supply.On this picture it is used to test a high precision light sensor. It does connect to a PC with usb in HID mode, without the need to install any specific driver. Here is the schematic, so simple ! Thank you to[Milka2009] who made a nice video Bill of material eagle files: usbscope-tiny.zip And last for today, the Windows display software UsbADC.zip.
Welcome I2C Tutorial Using the I2C Bus Judging from my emails, it is quite clear that the I2C bus can be very confusing for the newcomer. I have lots of examples on using the I2C bus on the website, but many of these are using high level controllers and do not show the detail of what is actually happening on the bus. This short article therefore tries to de-mystify the I2C bus, I hope it doesn't have the opposite effect! The physical I2C bus This is just two wires, called SCL and SDA. The value of the resistors is not critical. Masters and Slaves The devices on the I2C bus are either masters or slaves. The I2C Physical Protocol When the master (your controller) wishes to talk to a slave (our CMPS03 for example) it begins by issuing a start sequence on the I2C bus. Data is transferred in sequences of 8 bits. How fast? I2C Device Addressing All I2C addresses are either 7 bits or 10 bits. The placement of the 7 bit address in the upper 7 bits of the byte is a source of confusion for the newcomer. Easy isn't it?
DS0203 Oscilloscope $200 Description: DSO 203 is a pocket size 4 channel digital oscilloscope for common electronic engineering tasks. It's based on ARM cortex M3 (STM32VCT6), providing 72 MHz analog bandwidth with integrated FPGA and high speed ADC. Internal 2MB USB disk could be used to store waveform, user application and upgrade firmware. Feature: (beta) Pocket size and light weight; Two 72 MHz analog channels and two digital channels; Signal Generator ; Auto Measurement; Various Triggering Option; Easy waveform storage; Firmware upgrade; User applications; Open source. Specification (beta): Analog channel * 2: [CH_A] [CH_B]; Digital channel * 2 : [CH_C] [CH_D]; Vertical Scale: 20mV-10V/div (x1 probe); Vertical solution: 8 bit; Input coupling: AC/DC; Max input voltage: 80Vpp (x1 probe); Storage: 4K per channel; Software trigger type: edge, pulse, level (to be added); Hardware trigger type: edge; Trigger source: CH1/CH2/EXT; Test Signal generator: 10Hz to 1Mhz; Storage: internal 2MB USB disk; Sampling mode: real time;
Toner transfer no-soak, high-quality, double sided PCBs at home Warning: There are hot surfaces, chemicals and possibly ill advised actions like you would expect in many Instructables here. You will also be running tape and un-approved paper through a laser printer. There is a very real danger of messing up your printer. If you do wreck a printer please comment so we can all learn a valuable lesson. There are some good Instructables on using toner transfer, but after doing my own for a while I have some refinements on the process that I want to share. You should be able to create high-quality, well aligned double sided boards every time. If you are just dealing with a basic board for 0.1" pitch through hole components this is probably overkill. I have made excellent boards with 8 mill pads and 12 mill clearances. There are a few secrets. 1. a laser printer. 2. a hot laminator. 3. If you follow my directions to the letter you can get great results.
SX PC and USB Logic Analyzer, Signal Generator, I2C, SPI, Async Protocol Decoder and Analyzer The USBee SX Digital Test Pod combines state of the art design with easy to use PC software to give you a complete digital test bench in a small and affordable package. Connecting to your PC, the USBee SX Digital Test Pod uses the power and speed of the USB 2.0 High-Speed bus to capture and control information from your own hardware designs. The USBee SX runs the following applications: The USBee SX is a complete digital test bench in one compact and easy to use pod. Combined with the free, yet powerful, Windows® 7, Vista, XP and 2000 software the USBee SX is a deep buffer depth Logic Analyzer and Signal Generator. Included in the Logic Analyzer module is a High Speed Asynchronous Serial bus decoder, SPI Bus decoder and I2C bus decoder. USBee SX takes advantage of already existing PC resources. Included with the USBee SX is the Signal Generator software that lets you create digital waveforms using the USBee SX pod. The Signal Generator software provides the following functions:
50MHz DS1052E Rigol Oscilloscope Review 50MHz DS1052E Rigol Oscilloscope First Impressions 50MHz DS1052E Rigol Oscilloscope I recently purchased a 50MHz DS1052E Rigol Oscilloscope and have been impressed with how many features Rigol has packed into this device! A view of a single NTSC video Scan-line The oscilloscope trigger menu seems to have all of the features a demanding hobbyist could ask for. It is also easy to setup the trigger hold-off period when analyzing a PPM signal from an R/C radio to keep the updating PPM channels aligned on screen. When working with the oscilloscope I found it to be responsive and intuitive. I used the built-in FFT (Fast Fourier transform) mode to look at a simple FSK signal and it met my needs very nicely. This is an animated Rigol screenshot of a 100 kHz sine wave created using an ancient vacuum tube based signal generator. Dual Channel Signal Comparison I found the color LCD display easy on the eyes and the text was crisp on the screen.
Toner Transfer Paper - Matthew Sager Toner transfer paper is a method of making PCBs at home. You can buy special paper for making PCBs. I was wondering if it was possible to make your own toner transfer paper. It turns out you can. Making the dextrinPour a thin layer of corn starch (You can find this in your local supper market with the baking supplies) on a cookie sheet or pan. Let the powder dextrin cool then it can also be stored in powder form.I was mixing enough powered dextrin with water so I got a consistency of thin syrup. Coating the paper with dextrin I spread a thin layer of the dextrin on a piece of flat metal. Then peal the paper up and hang it up to dry. After a day or two take the paper down and flatten. Using the toner transfer paper for etching I am using one of my projects as an example. I print out a copy of the PCB that I will be etching. After it has been ran through the printer again it will look like this. Then I heat press the toner paper with the image on to the copper clad with an iron.
OLS - alternative Java client Welcome to the project page of Logic Sniffer Java client. This page will provide some documentation and, of course, download links. Table of contents Introduction The alternative OLS-client provides a software client for the Open Bench Logic Sniffer logic analyser hardware. The Open Bench Logic Sniffer is the result of a collaboration between Gadget Factory and Dangerous Prototypes. News August 12th, 2013, OLS version 0.9.7 released. What other people say about... I had to rock some intense LAing today, and I just wanted to say that the latest version is fantastic! It keeps getting better and better! Features The alternative Java client provides the following features: Cross platform: the client runs on Mac OSX (32/64-bit), Windows (32/64 bit), Linux (32/64 bit) and Solaris (32 bit); Simple installation: no longer fiddling with the serial libraries (RXTX) in order to get the client up and running. Documentation All documentation is maintained on the wiki. Download Changelog Screenshots Development
gabonator/DS203 Notes: Arduino-based logic analyser by follower - labradoc.com The process of getting an Arduino-based logic analyser working Download the current source from the repo: wget --no-check-certificate --content-disposition Should result in a file named something like gillham-logic_analyzer-c923ff1.zip. Then: unzip gillham-logic_analyzer-c923ff1.zip Install the OLS GUI application. Because we know this is serial (a.k.a.
cheap-thermocam.tk LED Video Wall | DorkbotPDX Several months ago, I was approached by the Portland band Starfucker (STRFKR) to build them an LED video wall for their upcoming tour. It needed to be large, bright, and durable, but also lightweight, portable, and easy to set up and tear down. They wanted to be able to plug in an iPod or iPad and play videos that are synced up along with their click track so everything goes along perfectly with the music. I enlisted the help of Alex Norman to take care of the software side of the project, and got to work trying to figure this thing out. It seemed like it could be made with mostly off-the-shelf components, and indeed that turned out to be the case. It didn't take long to find Adafruit's Digital Addressable RGB LED w/ PWM waterproof flexi strip, which looked like a good, simple solution for the pixels and drivers, since they all come together on a flex circuit and all you have to do is provide power and "SPI-like" data and clock signals. And here it is full-size: