Engineer Sergii Zadorozhnyi website
Simple SolutionsBlog Archives
RF Signal Generator as Arduino Uno Expansion Board
Saturday , 8, June 2019 Measuring, Radio Leave a commentIf You need for the RF signal source, proposed RF Signal Generator, made as Arduino Uno expansion board, can help out. The RF Signal Generator shield, designed with Direct Digital Synthesis (DDS) IC, is installed into Arduino Uno board directly, eliminating the very possibility of error when connecting such devices with wires.
Interfacing with Ultrasonic Ranging Module HC-SR04 via One Signal Line
Tuesday , 4, April 2017 Measuring, Software, Solutions Leave a commentTo connect the HC-SR04 ultrasonic ranging module to microcontroller (for example, Arduino UNO), four wires are usually required. But while the Vcc and GND wires are necessary, the Trig and Echo wires can be “combined” into one with a simple circuit. The software to control the HC-SR04 ultrasonic ranging module via one signal line see […]
Engineers and radio amateurs are interested in the static parameters of JFETs (Junction gate Field Effect Transistor), such as the zero-gate voltage drain current (IDSS) and the gate-to-source cutoff voltage (VGS(off)), as a rule, either when choosing JFET with the best parameters, or when selecting a pair of JFETs with the equal parameters for the […]
Attachment to Voltmeter for Measuring Static Parameters of JFETs
Monday , 4, July 2011 Measuring Leave a commentTo find out the parameters of JFETs, both n-channel and p-channel, the simple and inexpensive attachment to the voltmeter described below will help, which allows you to measure a zero-gate voltage drain current (IDSS) and a gate-to-source cutoff voltage (VGS(OFF)). Thus, using only this attachment with some kind of voltmeter, you can, for example, select […]
To control the temperature at several points using platinum or copper resistance thermometers, a simple and inexpensive eight-channel resistance-to-frequency converter will help, the advantages of which include noise immunity, unipolar power supply and low power consumption.
Input Amplifier-shaper for a Frequency Meter of Radio Receiver Digital Scale
Thursday , 1, May 2008 Measuring Leave a commentSuch a functional unit as an input amplifier-shaper is a necessary component of a digital scale-frequency meter for signals whose level does not exceed tens of millivolts. The signal applied to the input of such an amplifier is amplified to a level sufficient for the stable operation of digital pulse counters. The amplifier must not […]