MIDI circuit board schematic

This page describes a battery tester designed to characterize batteries and save the results on a microSD card. The battery tester circuit is engineered to evaluate the performance and capacity of various battery types, providing accurate and reliable data storage...

This is a straightforward and easy-to-construct infrared (IR) receiver circuit. The circuit utilizes only a few components and is capable of receiving a 38 kHz carrier signal. The operation of this circuit is simple; whenever the IR LED detects...

A problem has been encountered in a Phase-Locked Loop (PLL). A loop filter has been utilized, but the output spectrum does not meet expectations. In a Phase-Locked Loop (PLL) system, the loop filter plays a crucial role in determining the...

A very high-power amplifier with 10 pairs of power transistors. It can utilize MJ15024 and MJ15025 or MJ21193 and MJ21194. These 20 transistors function as the final active components. The design is based on four integrated circuits: TL072, TL074,...

A crystal oscillator circuit is a straightforward oscillator circuit that can be easily understood through its schematic diagram. It serves as a replacement for a conventional oscillator network, which typically consists of an LC combination. This simplicity is also...

The DS1620, in conjunction with a microprocessor, is utilized to monitor temperature. By controlling the fan, the thermal conditions of the chip can be adjusted to establish a temperature control circuit as illustrated in the accompanying figure. The system...