Comparator relay driver circuit

Lab III: Voltage Comparator and Relay Drivers by Using BJTs. This experiment has the following objectives: Gain familiarity with use of an opamp as a voltage comparator. Gain familiarity with with BJT transistor circuit calculations. Gain experience in interpreting manufacturer's datasheet. Relay Driver Output Schematic Time Delay Circuits Short timing functions such as a pulsed outputs or time delays can also be created with one or two comparator sections. The basic configuration for the positive voltage comparator, also known as a non-inverting comparator circuit detects when the input signal, V IN is ABOVE or more positive than the reference voltage, V REF producing an output at V OUT which is HIGH as shown. Non-inverting Comparator Circuit.

CZH-LABS Voltage Comparator Relay Board, DC12V, SPDT 10Amp Relay. 2 $ $ 99 Teyleten Robot LM V Voltage Comparator Module High Level Output Analog Comparator Control with LED Indicator（5pcs） 2. This means that the comparator could use a 12 Volt power supply while the load could be a 24 Volt relay or 5 Volt LED circuit. The following three diagrams are some examples of Dual voltage circuits. In the first two the voltage at the output of the comparators could even be full wave direct current. In Fig. 6 we use an external PNP bipolar transistor to drive a relay. When the open collector output of the comparator is turned on current flows through the 1K resistor and the base-emitter junction turning on the transistor completing the circuit for relay K1 and the LED on indicator.

Digital Transmission Isolator. DS Relay Driver with Strobe. DS *Absorbs inductive kickback of relay and protects IC from severe voltage. TDE is a monolithic comparator designed for high current and high voltage applications, specifically to drive lamps, relays, stepping motors. using a comparator-based switch-mode driver circuit of a solenoid Yields Versatile, Efficient Switch-Mode Solenoid/Relay Driver.