The discarded SW electronic energy-saving lamp ballasts used should be those with only burnt filaments and intact electronic ballast circuits. The modified "voltage converter" was used to replace the '...

This circuit is based on the characteristics of EPROM itself. The simplest method is used to read the value of each cell of the tested EPROM. If all are FF, it proves that it has been erased. The spec'...

　The function of this power no-load automatic circuit breaker is that when all the electrical appliances in the home are turned off, it can automatically cut off the power supply of the line, and when'...

The power amplifier circuit that I used 2A3C to connect is shown in the figure. The circuit is a three-stage triode amplifier circuit. Its advantages are that the odd harmonic distortion is very small'...

According to the experiment, a receiving circuit matching the simple plastic-sealed integrated infrared receiving head was made. The figure above is the circuit schematic diagram. In the figure, U1 is'...

This article introduces a "homemade" tube amplifier to audiophiles who like to get their hands dirty. Its mid- and high-frequency feel is as good as that of a single-ended Class-A amplifier made with '...

Here we introduce a low-cost stereo amplifier for driving low-impedance headphone devices. The circuit is shown in the attached figure. The circuit uses several commonly used transistors (BC547, BC557'...

This section introduces a simple and easy-to-make chasing colored light controller. As long as three sets of colored lights are properly arranged in a space, a chasing water effect can be formed. The '...

1. See the attached figure for the working principle circuit. The circuit outside the dotted line is the original car circuit, and the circuit inside the dotted line is the self-made 7-light warning c'...

NRF902 is a single-chip transmitter chip that complies with the European ETSI-ETS 300 220 specification and the North American (FCC) standard CFR47 Chapter 15 requirements. It is suitable for alarms, '...

Figure (a) is a relatively simple circuit, which uses the input resistor R1 and the feedback resistor R2 as part of the attenuation network, together with the resistor R3 to generate a variable offset'...

SN75490 is used to drive many commonly used thermal print heads. It contains 6 AND gate drivers with common strobe pulses. Each driver has a totem pole output. The output voltage is calibrated...

Transceivers use back-to-back tri-state buffers to connect different devices to a common communication bus that shares bidirectional data.

The MP3 charger in Figure 1 uses only one switching regulator integrated circuit (MC34063) and a few external components. When outputting +5V voltage, the current can reach 500mA and the power consump'...

The inverter introduced in this article has a simple circuit, low cost, easy maintenance, and high efficiency, and anyone with a little hands-on ability can make it.

MC34063 current expansion negative voltage output circuit diagram, input 5V, output 14.5V, adjusting R4 and R5 can change the output voltage.

This is a metal detection circuit that can detect coins or metal pieces under the carpet. This small device is very suitable for DIY

LA4440 is a single-chip dual-channel amplifier integrated block. It uses the characteristics of its built-in dual-channel symmetrical amplifier circuit to form a BTL circuit through simple external co'...

In this article, we'll cover the basics of ultra-wideband technology, including its origins, benefits, and a high-level understanding of the transmission method. Ultra-wideband (UWB) is a short-range '...

Step-down DC/DC converter, referred to as buck converter, also known as Buck Converter in English, is one of the most commonly used DC/DC converters. A buck converter can convert a higher DC voltage i'...