Tag: analog circuits projects

Analog electronic Analog electronic projects application schematics

Protecting DS18B20 Temperature Sensors from Static Electricity

| 2023/10/18

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

| 2023/10/18

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,…

Spy Bug Spy Camera Detector

| 2023/05/04

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…

Adapter Circuit For Silicon Temperature Sensors

| 2023/03/19

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 80 LED Audio Spectrum Analyzer Circuit

| 2021/09/30

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…

Microphone Vu Meter Circuit Strip Led

| 2021/09/20

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…

Speaker Protection Circuit

| 2021/09/20

One of the reasons why the speakers fail is that the amplifier fails and gives DC voltage to the output. The speaker protection circuit detects the DC voltage at the amplifier output and disconnects the speaker. The DC voltage detection level of the protection circuit is very low (0.7…1V) so that the speaker is protected…

Galvanic Isolation Logic Analyzer 8 Channels

| 2021/09/20

Galvanic isolation for a logic analyzer with 8 channels. Galvanic isolation for Logic Analyzer with 8 channels. Suitable for use up to 2MBit with 2V level and a little faster at higher levels. As always, everything is freely available, including a circuit diagram, board, etching mask and even a Reichelt shopping basket. I have purchased…

CNC Motor Driver Tester

| 2021/09/19

The purpose of the Motor Driver Test card is to check any of the motor drivers used especially in CNC machines. The tester is connected directly to the motor driver board instead of the interface. The tester has 4 switches that determine the state of Direction Signals (change direction of rotation), Enable (drive enable), Step…

Water Level Control Automatic Tank Filling

| 2021/09/19

Simple 555 circuit. The water tank filling circuit is based on the NE555 timer IC. By measuring the water level in the tank, it automatically starts the water pump motor at low water level and stops the water motor when the water in the tank reaches the specified level. The circuit can be used for…