Serial Avr Programmer Circuit

This circuit is designed for a small private telephone installation. The ringing tone sequence consists of 400 ms on, 200 ms off, 400 ms on, and 2 ms off. In the accompanying diagram, N1 and N2 create an oscillator...

This circuit represents a section of an octave equalizer utilized in audio systems. The table outlines the values of C1 and C2 required to achieve specific center frequencies. This circuit can provide a boost or cut of 12 dB,...

The BD5460 is a low power Class D amplifier that can be utilized in low power applications such as handheld audio devices. The BD5460 does not require an LC filter at the speaker output and can be powered by...

The circuit principle is illustrated in the accompanying figure. When the night light shines on the photosensitive resistor RG, it exhibits a high resistance (significantly greater than 50K). As a result, the output of the LSE pin is low,...

An eight-channel isolation circuit is constructed using the ISO120 and PWS740 components, designed for a 0 to 20 mA current loop. The figure illustrates only one channel, where the circuit converts a 0 to 5V input voltage into a...

Sawtooth wave generators using opamp are very common. But the disadvantage is that it requires a bipolar power supply. A sawtooth wave generator can be built using a simple 555 timer IC and a transistor as shown in the...