The circuit in this article uses TL494 and high-power MOS tube structure, and the output power can reach 10w. It has power consumption current limiting function, so it is not afraid of load short circ'...

The author has an unused V-shaped built-in information card and wants to make good use of the high-frequency head on the card. After consulting relevant information, he removed the high-frequency head'...

The voice-controlled bird is a simulated electronic handicraft. It looks like one or two colorful birds perched on a branch. Under voice control or manual switch operation, the bird makes a pleasant c'...

The alarm mechanism circuit uses a 6-chip non-Schmitt trigger, which has a simple circuit, small size (about the size of a cigarette box), easy to hide, and extremely low power consumption (a 9V lamin'...

As shown in the figure below, this circuit outputs a pulse when an object on the conveyor belt blocks the light. The light source keeps the phototransistor on. This will produce a high logic on the Sc'...

The following figure shows a single-tube stereo low-power amplifier, with V1 and V2 acting as left and right channel amplifiers respectively, and outputting 100mW audio power from output transformers '...

As shown in the figure, it is a low noise differential circuit. This circuit is based on the basic differentiator and adds a small number of components, so that it has overload protection capability, '...

As shown in the figure, it is a shielding drive circuit composed of INA131. It has been proved by anti-interference theory and practice that when a certain potential is added to the shielding layer of'...

In a dual power supply system consisting of AC power and battery, the simplest way to switch power is to use two Schottky diodes to isolate the two power supplies, as shown in Figure 1.

This is a simple spring reverb guitar effects circuit that can be built at a low cost, requires only a minimum number of electronic parts and of course the circuit itself requires a minimum of space. '...

This is a remote sensing type tester that does not require direct contact with the surface where the current is present. It can also be used to check if there is electricity in objects such as power c'...

The author used two Motorola 450MHz amplifier modules to make a wireless transmitter for CATV signals. Televisions within 20m of the transmitting antenna can wirelessly receive nearly 30 CATV programs'...

You will see how a high frequency oscillator bias reduces tapped recording distortion. Without HF bias, hysteresis can severely distort the output signal. The output DC magnetization lags behind the i'...

This project shows everything I did to build a RaspberryPi smart mirror. Through the smart mirror, I can access weather, time, news, and several other custom modules.

This is a DIY electronic card lock security system that can be used as a lock to open or close important electronics/appliances. When the card is inserted, a specific device will open based on where t'...

The advantage of the Mega chip is that it has 4 serial ports, which are the most suitable for serial communication in the chip. So I can connect the GPS and inverter and bluetooth adapter and still ha'...

This is a power supply device with current protection made of TL431. It mainly consists of two parts: voltage stabilization and current expansion and overcurrent protection. Its working principle is a'...

Circuit Working Principle The circuit of the electric pulse therapy instrument consists of a power supply circuit, a timing circuit and a pulse voltage generator circuit, as shown in Figure 9-4. The p'...

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Bass power amplifier circuit using TDA7294V chip