LC Meter Based on the AVR Microcontroller

A simple Field Strength Meter consists of a small antenna, a detector diode, a resistor, a capacitor, and a micro ammeter. This circuit is sensitive enough to detect HF fields when positioned close to the transmitting antenna. The circuit...

The video amplifier circuit utilizes the LM359 integrated circuit, which is a dual, high-speed, programmable current mode (Norton) amplifier. This circuit is suitable for general-purpose video amplification applications. The LM359 is designed to operate as a high-speed amplifier, making it...

Construct an oscillator that meets several specifications. The primary requirement is to incorporate exactly one capacitor. Another requirement is to achieve a high quality factor (Q) and produce a sine wave output. The design under consideration is Hartley’s oscillator,...

This circuit provides an intermittent siren output with an automatic reset function. It can be manually activated using a key switch or a concealed switch, and it can also be configured to engage automatically when the ignition is turned...

Capacitor C4 couples the output of U1 to a simple attenuator, which provides a loss of 0 dB, 20 dB, or 40 dB, depending on the setting of range switch S1. The circuit's sensitivity is 10 V rms for...

This transistor-based alarm system incorporates automatic exit and entry delays, along with a timed bell cut-off and system reset functionality. In addition to the exit/entry zone, the fundamental alarm board includes one instant zone, which is sufficient for many...