I've tryed to calibrate it with 1650mV DC but at minimum POT state (Rout=0 1,2ohm misured), UsbADC show 1633mV, in both channels. Many time I must change USB port or restart O.S. Sometimes continues to run fine but the USB interface will stop in 5-10 minutes. In the notebook run well only when power cord is connected!ĭuring run, in the 'game control panel' "Easylogger" disappears and, many time, UsbADC notifies "my device was removed". With the same USB hub and cable my 2 PC's (P4 3GHz, WinXP Pro. Lets an external PC control multiple 3000 Series oscilloscopes and upload oscilloscope data. In the 'game control panel' I found "Easylogger" and your application UsbADC recognise the device. Keysight recommends using the most current version, which includes the most up-to-date bug fixes and security patches available. SP3) with USB hub recognised your hardware. Only my notebook (old Acer travelMate 290, WinXP HomEd. Primarily thank’s to share your project -) I am hoping the C source for the PC program will be available soon. (this was taken from the EasyLogger data files) 1 x / 10 x scope probes, AC adapter and charger, adjustment screwdriver. The fuse settings for the ATTINY45 were as follows (for AVR STUDIO): and easily using an Extech MS420 20Mhz 2 Channel Digital Oscilloscope. The +5V line was red, the ground line was black (remember to connect shield to black), the D- line was white, the D+ line was green.ģ. I did not have the USB receptacle either, so just used an old USB cable with one end clipped off. I just put two regular diodes in series on the 5V line to drop the supply voltage to the ATTINY45 to 4V. I did not have the 3.6V zeners avaialble. Some info for other building one that may be useful:ġ. THANK YOU VERY MUCH! I bread-boarded mine last night and got it working this morning. UPDATE: broken links to source files have been fixed.Ī great idea and implementation. UPDATE: for all who requested the C# code for this app, here is the link usb-scope.zip done with Visual Studio 2005 There is no setup with it, so copy in a folder with the dll and try. HEX file ready to flash main.hex.ĭo not forget to set the fuses for internal PLL clockĪnd last for today, the Windows display software UsbADC.zip. Here is the C source for the firmware including usb lib and HID descriptorsĪnd for those who do not want to mess with compilers, the. Thank you to who made a nice videoġ R for led, from 220 to 470 ohm, smaller is brighterġ Pull up R 1.5K for USB device detectionĢ filter caps on analog inputs ( from 10nf to 470nf or nothing, up to you)ġ or 2 trimpots on analog inputs to scale your voltage to AD range (1.2V or 2.5V by software ) The Scope Connect software has been tested on Windows® 2000 Professional and Windows XP Professional platforms only. This is an exemple of my display programOf course you can write your own code to capture or display the datas It does connect to a PC with usb in HID mode, without the need to install any specific driver. On this picture it is used to test a high precision light sensor. It has been designed to plug into a project breadboard so there is no need for a power supply. Of course, do not expect 1Gs/s HID does not alow that data rate ! But it is using a 10bits AD. The cost with a home made pcb is around 5€. As you can see, there is no crystal, the software sync the internal 16.5Mhz pll clock with the USB clock. The firmware in the Tiny45 is written in C and compiled with Winavr and usb source code from obdev. One of the inputs can be scaled down with the trim pot. It has 2 analog inputs and can supply 5V ont the 4 pins header on the right. The awesome functionality-to-size ratio is due, in part, to the ATXMEGA32A4U microcontroller on board.This submini USB scope is based on a Atmel Tiny45 cpu and cost less than 5€ with a homemade pcb The scope itself obviously allows simultaneous sampling of analog and digital signals but also has several advanced trigger modes, XY mode for plotting Lissajous patterns, phase differences or V/I curves, Spectrum Analyzer with different windowing options and even an arbitrary waveform generator with sweep on all parameters. You can also connect it to your PC and use Gabotronics' XScopes software to control the device and view waveforms. The on-board graphic OLED matrix can display waveforms, measurements and menu systems. At only 1 x 1.6 inches, this oscilloscope can be plugged *directly into a breadboard. The XMEGA Xprotolab is exactly that: The first ever mixed signal oscilloscope, logic analyzer and arbitrary waveform generator in a DIP module. What you probably don't *imagine is a DIP package. When you think about a piece of equipment like a mixed signal oscilloscope you usually think of, well, a piece of equipment.
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