SCR Triggering Circuit using IC TCA-785 with Power Supply Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12889
Indian Lab Suppliers supplies the SCR Triggering Circuit using IC TCA-785 with Power Supply (Product ID: 12889) as part of its electronics engineering lab equipment range. It studies SCR firing with the TCA785 phase-control IC, which turns a reference voltage into gate pulses at a matching firing angle.
Quick Answer
The TCA785 takes a mains-synchronising signal, generates a ramp and compares it with a DC reference, so changing the reference moves the firing angle. Students examine the IC’s signal-conditioning and pulse-generation stages and use its output, through an opto-coupler and a BC107 transistor, to fire a 100 V, 1 A SCR fed from a 24 V, 300 mA AC supply. Built-in 15 V and 10 V DC (50 mA) regulated supplies and an isolated 5 V DC, 50 mA supply power the circuit, and the board runs from 230 V ±10%, 50 Hz mains.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | SCR triggering with controlled gate pulses; firing angle versus reference voltage; TCA785 operation |
| Control IC | TCA785 phase-control IC |
| Power device | SCR 100 V, 1 A |
| Isolation | Opto-coupler; transistor BC107 |
| DC supplies | 15 V and 10 V at 50 mA regulated; 5 V at 50 mA isolated |
| AC supply | 24 V, 300 mA; synchronising signal |
| Mains | 230 V ±10%, 50 Hz; ON/OFF switch, fuse and indicator lamp |
| Connections | 4 mm stackable patch cords, 0.5 m |
Where This Is Used
Used after the Triggering Circuits for SCR with Power Supply (Product ID: 12895) and with the Firing circuit using Ramp Comparator Scheme with Power Supply (Product ID: 12900) to compare discrete and IC firing schemes. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How is the firing angle changed?
By varying the reference voltage applied to the TCA785.
Why is an opto-coupler used?
It isolates the control electronics from the SCR circuit.
What SCR is fitted?
A 100 V, 1 A SCR.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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