Photo Transistor Trainer with Power Supply (C.R.) Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12287
Indian Lab Suppliers supplies the Photo Transistor Trainer with Power Supply (C.R.) (Product ID: 12287) as part of its electronics engineering lab equipment range. It shows how a phototransistor output follows light intensity and uses it to switch a relay.
Quick Answer
A 12 V lamp, fed from a 12 V AC, 50 mA supply with an intensity control, lights the phototransistor, and students record the output voltage as the light level changes. In the application circuit an op-amp used as a comparator switches a transistor stage (SL100 and BC107) that operates a 12 V DC relay, with red and green LEDs showing the state. A 240 V, 60 W bulb, not supplied, serves as the switched load. The board has an internal ±12 V DC, 150 mA supply. The relay load is at mains voltage, so wire it with the power off and keep the lamp circuit covered.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | Output voltage vs light intensity; light-operated relay using a comparator and transistor switch |
| Light source | 12 V lamp with holder, 12 V AC 50 mA supply with intensity control |
| Sensor | Phototransistor |
| Switching | 12 V DC relay; transistors SL100 and BC107; red and green LEDs |
| Supply | ±12 V DC at 150 mA, IC regulated, internal |
| Mains | 230 V ±10%, 50 Hz AC; ON/OFF switch, fuse and indicator lamp |
| Also required (not included) | 240 V, 60 W bulb |
Where This Is Used
Used in optoelectronics and transducer practicals. Related: Optical Transducers Trainer (Photoconductive Cell, Photovoltaic Cell, Phototransistor & Pin Photodiode) (Product ID: 13312) and Burglar Alarm using 555 Timer & LDR with Power Supply (C.R.) (Product ID: 12297). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How is the light level varied?
With the intensity control on the 12 V lamp supply.
What does the relay switch?
An external 240 V, 60 W bulb, which the buyer provides.
Which transistors drive the relay?
An SL100 and a BC107.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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