Built on stereo tone control circuit TL072, LM358 Opams PCB dimensions are small 56x68mm. The supply voltage of the tone control circuit is unipolar. A virtual ground is created with the LM358 opamp. The voltage is connected according to the follower circuit. Using the voltage divider R3R4, half the supply voltage is applied to the…
The subwoofer filter, or low-pass filter, is designed to suppress high frequencies that shouldn’t be fed into the audio amplifier’s input and then into the low-frequency head (woofer, subwoofer). The subwoofer filter has a cutoff frequency. A signal input to the filter with a frequency greater than the cutoff frequency will be attenuated. These signals…
A 2X16 LCD screen is used to display the data based on the weekly timer circuit PIC16F628A microcontroller and the DS1302 real time clock IC. There are different software for using 1.7 Channel without changing the PCB drawing. Relays 12V 10A Clock, calendar, 4 buttons are used for on-off settings of relays. The current drawn…
PT2240, PT2262, HT6P20B RF Transceiver ICs were cloned as software and application circuits were made with microcontroller. Clone circuits may be higher in cost, but it is a very good resource in terms of software. It is very difficult to put the working system of ICs such as PT2240, PT2262 into software. HT6P20B PT2240 PT2262…
The high-power control circuit motor reversing DC motor speed controller circuit features soft start, relay switching of motor direction, and PWM speed control. I have shared the circuit before. There are details in the article “High Power 30 Amp DC Motor Speed Control Circuit”, but I prepared a new article because I applied it and…
Voltage-Current converter circuit AD694JN integrated circuit based on the circuit, fed through the 7815 regulator input voltage can be 18-35 VDC. The minimum value of the power supply for 0-10V is 12.5V. The “4mA” value in the uncalibrated model was 4.18mA. The values given in the diagram are taken from the catalog note, 2k potentiometers…
The amplifier gained popularity with its ease of assembly, excellent repeatability and acceptable characteristics, while having a simple circuit, and of course the advantages of class-B (relatively high efficiency and good thermal stability), without the inherent distortions of this class. using the NE5532 operational amplifier, there is no need to introduce a zero offset adjustment…
The circuit consists of the following units: a rectifier with a filter, a +12V voltage stabilizer, voltage stabilization, current stabilization, indication, a control unit and overheating protection. If the output voltage can reach 50V, and not limited to the supply voltage of the op-amp (32 V), as in the vast majority of LBP circuits. The…
1200W 60V SMPS Power supply UC3844 Classic topologies of blocking converters are usually considered suitable only for small ones performance, on the order of about 100-200 W. Their main advantage for low-power applications is simplicity and large input voltage range. At the output of the transformer only the rectifier diode and the output capacitor are…
The water sensor is used in various devices in factory, automation, etc. used very often in their work. Mainly for automatic water tank filling, irrigation, heating, control and more. etc., in general, sensors are used where there is water. The use of a spark plug as a water sensor is not new. Some manufacturers even…