Bike Flashing LED Lights Circuit
Bike Flashing LED Lights Circuit. If you’re a cycling fan and you like biking, night and day, this useful circuit will make you to be visible and safe
Basic structure of the sinusoidal oscillator
The sinusoidal oscillator basic structure consists of an amplifier (A) and a selective frequency network (ß) connected in a positive feedback loop
Main Power failure alarm and battery backup Circuit
This Main Power failure alarm circuit tells us when the electricity that powers a system or circuit, is gone.
What is a Photodiode? Light Detector Diode.
Photodiode looks similar to the common LED, but it has a feature that makes it very special. It is a device that converts light into electric current.
Temperature alarm circuit with 741 operational amplifier
This temperature alarm circuit with operational amplifier activates a relay when the temperature of the place to be controlled exceeds a set level. Useful for an oven temperature control or a cooling system
Operational Amplifier as Comparator (voltage comparator)
Operational Amplifier as comparator. Op-Amp can work as comparator when the differential gain in open loop is high and the speed is not a critical factor
Amplifiers and Amplification
Amplifiers are circuits that are used to increase an input signal, thus you can obtain an output signal with much greater amplitude than the original one. Amplification is the process to increase the magnitude of a signal, generally using an amplifier.
This continuity tester using 741 operational amplifier, operates as a differential amplifier.
A good application for this circuit would be to test welds made on a printed circuit board. It could be also used to test continuity of wires, connections, etc.
The series RC circuit.
In a series RC circuit, the current through the resistor and the capacitor is the same. The voltage VS is equal to the phasor addition of the voltage drop across the resistor (Vr) and the voltage drop across the capacitor (Vc).
Over temperature alarm circuit using Thermostat
This alarm circuit uses the 67L080 thermostat (TH) and can be assembled easily, due to the small number of components required.
Series and Parallel Resistor Reduction.
Simplifing a series resistor circuit and / or parallel resistor circuit is simple, it is only necessary to make the necessary simplifications using formulas we already know
