SCR Firing Techniques RC UJT and Digital Firing

The SCR Firing Techniques Trainer is designed for studying different methods of SCR triggering and firing, including RC, UJT, and digital firing techniques. It provides a practical platform for understanding SCR operation, firing control, resistive and inductive loads, and controlled switching. The trainer includes multiple DC and AC power supplies, SCR circuitry, load arrangements, and a selection of firing techniques for practical experimentation. The unit is housed in an ABS plastic cabinet with a clearly printed insulated circuit board. Designed and manufactured by Atico Export to meet the practical demands of modern laboratories.

Power Supplies:

• DC supply: Regulated 0–5 V DC, 250 mA.
• DC supply: Regulated 0–30 V DC, 250 mA.
• Rectified DC source: +30 V / 250 mA.
• Isolated AC power supply: 0–12 V, 250 mA.

Components Mounted on Panel:

• SCR.
• Resistive load: 6 W resistor with rotary switch.
• Inductive load: 12 V DC motor with fan.
• 2-bit SCR assembly.

Firing Techniques:

• RC firing.
• UJT firing.
• 555 IC PWM firing.

• Instruction manual.
• Mains operated at 230 V, 50 Hz.
• 4 mm patch cords.
• Supplied through a 3-pin computer socket with appropriate fuse.
• Housed in an ABS plastic cabinet.
• Trainer size: 12 × 8 inches.
• Front panel with high-class insulated printed circuit board featuring clearly printed circuits and symbols.
• Fuse protection against short-circuit conditions.