This article introduces two tube preamplifiers with their own characteristics. They can be connected to various post-amplifiers to obtain the charming sound of tube amplifiers. Especially when used wi'...

Can be used with any number of normally open switches. Adapt mercury switches so that they are lifted off when the steering moves or when the bike is lifted off its side, or raised off its center stan'...

A simple mobile phone charging abnormal alarm circuit diagram, you can design a mobile phone charging abnormal alarm for the mobile phone, the specific ideas and implementation methods are relatively '...

This circuit consists of a multivibrator and a power amplifier circuit as shown in the figure. The frequency-adjustable multivibrator composed of NE555 and peripheral components generates a frequency-'...

A very simple power amplifier, the output tube only needs NPN, no NPN+PNP, and the materials are relatively easy to find. In fact, this circuit was previously used in a certain fool-proof thick-film p'...

This circuit is mainly composed of a 555 time-base integrated circuit. It has the characteristics of simple circuit, stable and reliable operation, easy installation and use, and the opening and closi'...

As shown in the figure below: This device is a typical safe and energy-saving starting circuit. When the power switch QS is closed, the AC contactor KM coil is energized and closed.

The circuit of the intermittent cockroach killer is shown in the figure. It mainly uses DC high voltage electricity to kill cockroaches. However, since cockroaches are sensitive to electric fields, th'...

The transistor ring current generator converts the DC voltage 24V into an AC ring current voltage of 60~90V, which is used to supply the ringing of communication equipment, such as carrier machines, h'...

The SPI interface is a synchronous serial data transmission between the CPU and peripheral low-speed devices. Under the shift pulse of the master device, the data is transmitted bit by bit, with the h'...

This integrated electronic energy-saving emergency light uses finished electronic energy-saving lamps as lamp holders, which has the following advantages: 1. Local materials are used and are in large '...

This device can make the green and red colored light groups flash continuously with the change of the frequency and strength of the music, producing a seamless effect of sound, color and light, giving'...

　TC9153 is a CMOS high-fidelity volume control dedicated integrated circuit launched by Toshiba. The circuit is characterized by low power consumption, current of about 1 to 3 mA. Low distortion, THD '...

As shown in the figure, this is the current feedback amplifier circuit of OPA660. Signal V1 is input to pin 3 of OPA660 through a 47Ω resistor, amplified by the internal amplifier 1 and output from pi'...

As shown in the figure, the basic connection circuit of HA-5340 in the same phase unit gain mode has a very high throughput rate. As a fast data acquisition A/D conversion input stage, the input signa'...

The timing reminder circuit is shown in the figure. The whole circuit consists of a 6s time base generator, a 6s frequency division timing and display, and a sub-timing and display.

The boost driver circuit composed of RT8450 is shown in the figure below. In this circuit, the withstand voltage of Schottky diode D1 and the withstand voltage of C5 must be higher than the maximum va'...

This Design Idea shows how to build a reliable, low-cost, simple inductance meter. The basis of the inductance meter is a Pierce CMOS buffered oscillator (see Figure)

This is the circuit diagram of a product called TF903 ultra-long-range antenna amplifier. The specific product information cannot be verified, but the circuit diagram is still of reference value for e'...