Voltage Controlled Switch using 555 Timer
The 555 timer, a versatile integrated circuit, is commonly employed in timer, delay, pulse generation, and oscillator applications. In this particular configuration, it is repurposed as a voltage-controlled switch, allowing for control over a load based on a variable input voltage.
The circuit typically consists of the NE555 timer configured in monostable mode, where it can be triggered by a voltage signal. When the input voltage exceeds a predetermined threshold, the timer activates, allowing current to flow through the output, which can be used to drive a load such as a motor, LED, or relay.
Key components in this circuit include the 555 timer IC, resistors, capacitors, and a power supply. The resistors set the threshold voltage and the timing characteristics, while the capacitor determines the duration of the output signal once triggered.
The operation begins when a voltage is applied to the trigger pin of the 555 timer. If this voltage surpasses the reference voltage set by the resistors, the output pin goes high, activating the connected load. The output remains high for a time period determined by the RC time constant of the circuit, after which it returns to a low state.
This application of the 555 timer as a voltage-controlled switch is advantageous in scenarios requiring precise control over electrical devices based on varying voltage levels, offering a simple yet effective solution for automation and control in electronic systems.In this circuit the 555 timer is used in a novel way, as a voltage controlled switch.The old and omnipresent NE555 can be very good at someth.. 🔗 External reference
Related Circuits
A simple PWM lamp dimmer using the NE555 timer IC. The 555 timer IC is configured as a variable duty cycle astable multivibrator to control the brightness of the lamp. The described circuit utilizes the NE555 timer IC, a versatile...
Inspired by a previous project, a unique design was developed that incorporates an umbrella capable of playing musical notes when pressed. For additional information regarding the 4051 chip, which functions as a multiplexer or demultiplexer, refer to resources available...
The circuit diagram represents a simple parking sensor system that measures the distance between the rear bumper of a vehicle and obstacles located behind it. The schematic consists of two main components: the transmitter and the receiver. The distance...
Nowadays, many intercom units are equipped with video cameras, allowing users to see as well as hear who is at the door. Unfortunately, the camera lens is... Intercom systems with integrated video capabilities enhance security and convenience by enabling visual...
The 555 timer is a versatile component that can be utilized as a timer and configured to produce a specific frequency. In Part II of Electronic Project I, a circuit was created to make an LED flash. This time,...
This circuit switches a printer's USB connection from a PC to a laptop. The objective was to create a solution that enables a laptop to use the printer intermittently while maintaining the printer's primary connection to the PC. Instead...