Zero Crossing Detector with power supply Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12275
Indian Lab Suppliers supplies the Zero Crossing Detector with power supply (Product ID: 12275) as part of its electronics engineering lab equipment range. It produces a pulse each time a 50 Hz AC waveform crosses zero volts.
Quick Answer
A fixed 10 V p-p, 50 Hz AC signal is applied to an IC 741 comparator referenced to 0 V, which turns the sine wave into a square wave that changes state at every zero crossing. An RC differentiating circuit then converts those edges into short pulses synchronised with the mains. Students compare input, square wave and pulses on a dual-trace 20 MHz CRO (not included). Two IC 741s and an internal ±15 V DC, 50 mA supply are on the board.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiment | Pulses synchronised with AC mains zero crossings |
| Circuit blocks | Op-amp comparator, RC differentiator |
| Test signal | 10 V p-p fixed AC, 50 Hz |
| Op-amps | 2 x IC 741 |
| Supply | ±15 V DC at 50 mA, IC regulated, internal |
| Mains | 230 V ±10%, 50 Hz AC; ON/OFF switch, fuse and indicator lamp |
| Also required (not included) | Dual-trace 20 MHz CRO |
Where This Is Used
Used in op-amp and power-electronics firing-circuit practicals. Related: Synchronized Pulse Generator with Power Supply (Product ID: 12285) and Study of OP-AMP Comparator (Product ID: 12258). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
Where are zero-crossing pulses used?
For timing, such as synchronising thyristor firing circuits to the mains.
What converts the square wave to pulses?
An RC differentiating circuit.
Which oscilloscope is needed?
A dual-trace 20 MHz CRO.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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