Going off topic, the LED dancing lights were a craze when the
LEDs came to market. with transistors like 2N2222 small Gizmos
were made and powered by 9V batteries. The adorned bicycles,
cars and even the coat pockets of the party going folk; to
make an impression with the people of the opposite polarity.
This circuit with some modification was also used by many firms in the manufacture of "Electronic Chokes" it was used with the Large 40W Tubelights. The main failures that occur in this topology are the two HV NPN Devices.
DC Regulated Power Supply
This is a Regulated 0-30 V DC Power Supply manufactured by me in small numbers, 0-30V 5A and 5V -5A. It had a Switching Preregulator. This keeps the Vce across Transistor Bank at the Back of Instrument, at the lowest possible level, in order to keep them Cool. When Vce and Ic both are more in a Power transistor it will get heated more, then the efficiency of power supply is low.
The Output had both Constant Current Control and Constant
Voltage Control. The CC control is also a Short circuit
protection. The Output was protected from outside voltages
damaging output circuits even when equipment is switched off.
The back panel is a finned anodized black aluminum heat sink
with many transistors.
10th Jun 2020
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