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To connect the HC-SR04 ultrasonic ranging module to microcontroller (for example, Arduino UNO), four wires are usually required. But while the Vcc and GND wires are necessary, the Trig and Echo wires can be “combined” into one with a simple circuit. The software to control the HC-SR04 ultrasonic ranging module via one signal line see […]

The modification of the DEGEN DE1103 radio receiver described below was done to provide the radio receiving in long and medium wave bands with an external antenna (or with the standard telescopic antenna), but not with the built-in ferrite rod antenna. Now while working on short waves too, the received signal from the standard telescopic […]

Using special soldering iron tips or a hot air gun to desolder surface mount chips in a TQFP package carries the risk of overheating the chip and / or printed circuit board. Below is a method for safely removing chips in a TQFP package – without overheating and with the ability to reinstall the desoldered […]

The simple automatic charger we are talking about is assembled from readily available parts, the total cost of which does not exceed the price of a single AA nickel-metal hydride rechargeable cell, which the device is designed to charge. You can assemble it on a printed circuit board, the dimensions of which are not much […]

Showing on a seven-segment LED display of digital information in a microcontroller based circuits is common, and the developers of such circuits perform it in their each own way. The display module is described below, which may well become a universal solution, which will greatly simplify the development of new devices.

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