In electronic equipment, defects in oxide capacitors are often the cause of failure.. And if the break, breakdown or loss of capacity is easy to determine, the increased internal resistance (ESR) it is impossible to determine without a special device. One of the variants of such a device is offered.… Continue Reading
The article contains schemes of three non-standard, but simple frequency-controlled RC square wave generators, made on transistors of structure p–n–p and n–p–n. The number of options for rectangular pulse generators, according to the most conservative estimates, is more than one hundred. However, on the pages of periodical… Continue Reading
The calibrator is designed to measure the amplitude of the signal by comparison on a potentiometer scale. This method was widely used in oscilloscopes during the time of tube technology., currently it looks somewhat archaic and uncomfortable, but its advantage is a sufficiently high measurement accuracy (to 5%).… Continue Reading
The author developed his version of the dosimeter based on the Open Geiger project.. The device presented here is largely compatible with the prototype., and also has its advantages. As for the hardware, copyright input is mainly limited to the development of a new circuit board with… Continue Reading
Most of today's portable electronic devices draw power from the batteries, which have a limited life. Each charging and discharging cycle in small steps helps to demolition and battery "battery holds less". Presented device can measure the energy efficiency of the battery and to determine its consumption.… Continue Reading