Introduction Before presenting this great tip I must admit I did not come up with this idea. This type of measurement probe is presented in the book High Speed Digital Design – A Handbook of Black Magic by Howard W. Johnson and Martin Graham. I first saw the idea written by fellow DIYer Janne Ahonen but he […]
ROBUST HIGH-BANDWIDTH PASSIVE DIY PROBES Continue Reading
Normally -according to the Ohm’s law– when the applied voltage is increasing, the current is increasing too, however some components can break this law. When the voltage increases, current decreases. This is called negative resistance. One of the most know element that exhibits this behavior is a tunnel diode. Once very promising, today it isn’t
Simple negative resistance oscillators Continue Reading
BEAVERTON, Ore., March 15, 2016 /PRNewswire/ — Tektronix, Inc., the world’s leading manufacturer of oscilloscopes, today introduced the P7700 series of TriMode™ probes for use with Tektronix performance oscilloscopes. Offering up to 20 GHz bandwidth, the new probes ease the challenges designers face when debugging circuits found in the latest mobile and enterprise designs by minimizing
High-performance scope probes top out at 20 GHz Continue Reading
One of our technicians recently asked for help determining the value of an SMT inductor. It was unmarked, and was many turns of very fine wire on a ferrite core. The resistance measured 26Ω, which for some reason gave our ancient LCR bridge a conniption, and read 30mH along with a blinking error message. The
Measure small LCs with a scope Continue Reading
Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller – variant of miniscope v2e with input amplifier (MCP6S21 PGA) added. This is minor update, but input PGA fixes problem with input leakage of STM32F042 allowing increasing input impedance at the same time. Quick specification follows miniscope v2a-d idea: very simple device streaming data in real
Miniscope v2f Continue Reading
Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller. Quick specification follows miniscope v2a-d idea: very simple device streaming data in real time to PC; DLL and GUI (Win32) are handling all the functionality, sampling: 480 kSps, 8 bit, single voltage range, streaming via USB FS with libusb (32/64bit) used as driver, record length: 4k
Miniscope v2e Continue Reading
Edison-Scope, is an Intel Edison controlled 200 Msa/S mixed signal oscilloscope. It provides an Operating System agnostic method to control the MSO-28 oscilloscope. By leveraging the web browser on the modern smart devices, one can control USB based hardware traditionally requires a desktop OS. Conceptually this project is very similar to the PiMSO project, but
