Demo comparator
Description: This circuit is an operational amplifier (op-amp) configuration that operates without a feedback resistor. The junction point of resistors R2 and R3 establishes the reference voltage. When the input voltage, determined by resistor R1, falls below this reference voltage, the LED illuminates. Conversely, if the input voltage exceeds the reference voltage, the LED turns off.
The described circuit utilizes an op-amp in a comparator configuration. In this setup, the op-amp compares the voltage at its non-inverting input (connected to R1) with the reference voltage established at the junction of resistors R2 and R3. The output of the op-amp will switch states based on this comparison.
Resistor R1 is responsible for setting the input voltage level. When this voltage is lower than the reference voltage, the output of the op-amp will go high, activating the LED. The LED serves as an indicator, providing visual feedback regarding the input voltage relative to the reference voltage.
The reference voltage is determined by the resistor divider formed by R2 and R3. By selecting appropriate values for these resistors, the desired threshold for the input voltage can be established. If the input voltage exceeds the reference voltage, the output of the op-amp will drop to a low state, turning the LED off.
This circuit can be utilized in various applications where voltage level monitoring is required, such as in battery management systems, voltage level indicators, or as part of a more complex control system. Proper selection of the op-amp and passive components is crucial for ensuring the desired performance and stability of the circuit.This circuit is an op amp without a feedback resistor. R2 and R3 junction point sets the reference voltage. When the input voltage set by Rl is below the reference voltage the LED glows. If voltage is above reference, the LED goes off.
The described circuit utilizes an op-amp in a comparator configuration. In this setup, the op-amp compares the voltage at its non-inverting input (connected to R1) with the reference voltage established at the junction of resistors R2 and R3. The output of the op-amp will switch states based on this comparison.
Resistor R1 is responsible for setting the input voltage level. When this voltage is lower than the reference voltage, the output of the op-amp will go high, activating the LED. The LED serves as an indicator, providing visual feedback regarding the input voltage relative to the reference voltage.
The reference voltage is determined by the resistor divider formed by R2 and R3. By selecting appropriate values for these resistors, the desired threshold for the input voltage can be established. If the input voltage exceeds the reference voltage, the output of the op-amp will drop to a low state, turning the LED off.
This circuit can be utilized in various applications where voltage level monitoring is required, such as in battery management systems, voltage level indicators, or as part of a more complex control system. Proper selection of the op-amp and passive components is crucial for ensuring the desired performance and stability of the circuit.This circuit is an op amp without a feedback resistor. R2 and R3 junction point sets the reference voltage. When the input voltage set by Rl is below the reference voltage the LED glows. If voltage is above reference, the LED goes off.
220V LED Flasher circuit diagram
This is a 220V LED flasher circuit designed as a reliable alternative to thermally activated switches used for flashing Christmas tree lamps. It is a cost-effective and easy-to-assemble circuit. The components include R1 (100K), R2 (1K), R5 (1K), R3 (470R),...
Triangle / Squarewave Generators
A simple triangle and square wave generator utilizing a common 1458 dual op-amp, capable of operating from very low frequencies up to approximately 10 kHz. The time interval for one half-cycle is determined by the product of resistance (R) and...
led workbench lighting
A highly practical workbench lighting unit designed for electronics hobbyists. The portable inspection lamp circuit features an onboard voltage regulator and a high-brightness 5mm white LED. It can be powered by any 9 to 18 volt DC-rated AC mains adapter...
op amp Why do some of my IE converter circuits have a large offset voltage
The inverting input is maintained at a low level via a 10K resistor when the circuit is powered on but not in use. During measurement activities, including calibration measurements where the input is floating, this resistor is disconnected. The circuit...
knight Rider 2
This project describes a light effect that is similar to the one of the car in the TV series "Knight Rider."
The light effect project emulates the iconic scanning LED light sequence featured in the "Knight Rider" television series. The design...
STRESS METER
It consisted of 16 LEDs in a circle with two touch pads. By placing your fingers on the touch pads, the circuit started and ran the LEDs in a "chaser" pattern around the display, with a beep each time a...
LED Pumpkin Candles for Colorful Halloween Jack-O-Lanterns
Discrete blinking LEDs are convenient, but the blink rate and duration are not configurable. Experimentation with transistors, resistors, and capacitors was attempted to modify the blinking LED behavior. Ultimately, the abundance of additional electronic components led to the conclusion that...
Output-limiter
The HA-5190 operational amplifier is rated for an output swing of ±5 V and saturates at ±7 V. As is typical with most operational amplifiers, the recovery time from output saturation is slower than the amplifier's normal response time. Therefore,...
LED Emergency Light Circuit With Battery Over Charge Protection
The following circuit is an LED emergency light circuit featuring advanced functionalities such as overcharge battery cut-off, daytime auto-disable, and automatic activation of the LEDs during AC mains failure, reverting to charging mode when power is restored. The circuit employs...