S.C.R. Lamp Flasher with Power Supply Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12894
Indian Lab Suppliers supplies the S.C.R. Lamp Flasher with Power Supply (Product ID: 12894) as part of its electronics engineering lab equipment range. It builds a DC flasher with two SCRs and uses it to switch a TRIAC so a 230 V, 40 W lamp flashes on AC.
Quick Answer
A 2N2646 UJT relaxation oscillator triggers two SCRs as a symmetrical twin-lamp DC flasher, shown on two LEDs, and a potentiometer changes the flash rate. In the second experiment the same DC flasher turns a 4 A, 400 V TRIAC on and off to flash an ordinary incandescent lamp at mains voltage. Toggle switches select the DC or AC flasher, and a 12 V DC, 100 mA regulated supply powers the control side. The board runs from 230 V ±10%, 50 Hz mains; the lamp circuit is live.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | Symmetrical DC flasher; high-power AC flasher |
| Devices | 2 SCRs; TRIAC 4 A, 400 V; UJT 2N2646 |
| Indicators | 2 LEDs for the twin-lamp DC flasher |
| Load | 230 V, 40 W lamp |
| Controls | Flash-rate potentiometer; 2 toggle switches |
| Supply | 12 V DC, 100 mA, IC regulated |
| 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 with the SCR Ring Counter with Power Supply (Product ID: 12888) and the Thyristor Alarms with Power Supply (C.R.) (Product ID: 12887) in SCR application practicals. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How is the flash rate changed?
By varying the UJT oscillator frequency with the potentiometer.
What is the AC load?
A 230 V, 40 W incandescent lamp.
Why is a TRIAC used for AC?
It conducts in both half cycles, so the lamp gets full AC power when on.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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