Illumination Control using SCR with Power Supply Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12913
Indian Lab Suppliers supplies the Illumination Control using SCR with Power Supply (Product ID: 12913) as part of its electronics engineering lab equipment range. It controls the brightness of a lamp with a UJT-fired SCR.
Quick Answer
A bridge rectifier and zener diode provide a synchronised supply for the UJT oscillator, whose pulses fire the SCR at a point in each half cycle set by the illumination potentiometer. Delaying the firing point reduces the power reaching the lamp. The board is self-contained, with a 230 V, 100 mA isolation transformer, weighs about 2.8 kg and runs from 230 V AC ±10%, 50 Hz. The lamp circuit is at mains voltage, so switch off before changing connections.
Key Specifications
| Parameter | Detail |
|---|---|
| Devices | UJT, SCR, zener diode |
| Supply | Isolation transformer 230 V AC, 100 mA; bridge rectifier |
| Control | Illumination potentiometer |
| Load | Lamp |
| Mains | 230 V AC ±10%, 50 Hz; ON/OFF switch, fuse and indicator lamp |
| Weight / size | About 2.8 kg; W 340 × H 125 × D 210 mm |
| Connections | 4 mm stackable patch cords, 50 cm |
Where This Is Used
A close variant of the UJT Firing Circuit of SCR with Power Supply (Product ID: 12911); the To Trigger a SCR by using a LDR (Product ID: 12891) adds light sensing. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How does the SCR change lamp brightness?
Firing later in each half cycle lets less power reach the lamp.
Is other apparatus needed?
No, the board is self-contained.
What triggers the SCR?
A UJT relaxation oscillator.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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