It is actually a simple circuit that makes a flip flop with three different opamp types. The PCB design of the elector is slightly different and the sockets used for testing are assembled using solder. I made a new PCB drawing that collects all the elements on the mounting face, so we have nothing to…
Classic analog ESR meter is a circuit based on SN74HC14N integrated circuit, it mainly consists of 150Khz oscillator, buffer, comparator and rectifier amplifier. The maximum range is approximately 75 Ohms and values below 1 ohm will cause some difficulty in reading the position of the galvanometer pointer due to the area used on the scale…
Simple Circuit for measuring low resistance values. It is designed to measure low resistance values from 0.01 to 19.99 Ohms. The measurement circuit and the voltmeter must be fed from two separate power sources (battery). You MUST Use Two Separate 9 Volt Batteries in All These Circuits. Using a double-contact switch, you can connect both…
When implementing control systems, you may encounter many problems of an analog-digital nature. One of these is to detect whether alternating current of a certain intensity passes through a particular cable; This could be a signal that the machine is working properly or vice versa. Current Transformer Module relieves the designer from the burden of…
When the DS18B20 Temperature Sensor is transported over long distances, there is a danger of high voltage pulses being transmitted to the cable connecting the sensor to the control unit. If protective measures are not taken, the induced high voltage will lead to degradation of the crystal substrate where the sensor is located. This causes…
Magnet polarity detector. You can find out where the south or north of the magnet is by bringing another magnet of known polarity. And if the pole of a known magnet attracts the side of the magnet with polarity, it is opposite if it is unknown (the pole of the unknown magnet). In other words,…
With the rapid development of electronics, it is unfortunately becoming commonplace to install wireless devices for listening and video transmission in apartments and workplaces. However, even if the operating systems are known, it is not so easy to detect such devices. These devices are very small in size and very similar to the devices we…
Temperature measurement is one of the more problematic in electronics. Digital output sensors have a very limited operating range and platinum ones are expensive. Inexpensive silicon sensors may be a solution, but coupling them with a microcontroller is not easy. This arrangement makes them much easier to use. The presented adapter is designed to work…
LM3915 The connection stands and falls with analog amplification and filtering of audio signals using operational amplifiers. The audio signal is first amplified and impedance separated by connection with the operational amplifier IC9 TL071. Negative feedback (and thus signal amplification) is affected by the TR1 680k trimmer. You can calculate how many times IC9 will…
The microphone vu meter circuit was normally a classic design with 10, I just rearranged it as a single channel strip led vu meter by using the microphone preamp stage and increasing the output power with 50N06 mosfet IRFZ44, IRF3205 and similar N-channel mosfets can be used instead of 50N06 mosfets used in the LM358…