Regulated 12 volt power supply circuit

This is a simple yet reliable device based on one of the oldest integrated voltage regulators, the LM723. The LM723 is a versatile voltage regulator that can be configured to provide a wide range of output voltages. It is capable of...

Thrifty Voltage Regulator

One of the drawbacks of a three-pin voltage regulator is that the input voltage needs to be 2.5 to 3 V higher than the output voltage. This makes these integrated regulators unsuitable for battery power supplies. For instance, if the...

Bridge Rectifier

This bridge circuit is designed for applications requiring two unequal supply voltages. The lower voltage is obtained using a transformer with symmetric windings and half-wave rectification of the potential across one winding. The higher voltage is derived from the potential...

BMW R Series Motorcycle Regulator Schematic

Correctly adjusted, the voltage on the pot wiper is slightly less than half D+ (appx. 0.47*D+) and Q1 will conduct if (D+)-(Vp) > 6.2 + 0.7 + 0.7, or 0.53*(D+) > 7.6V, (D+) > 14.3V. If D+ is lower than...

-15 V 1-A Regulated Power Supply

The supply receives -20 V from the rectifier/filter which is fed to the collector of the Darlington pnp pass transistor, a TIP105. The base drive to the TIP105 is supplied through resistor R5. The base of the TIP is driven...

12V DC Dual Power Supply Circuit with IC 7812&7912

The 78W series voltage regulators are designed to handle an input voltage of approximately 35V, while the 24V type can withstand up to 40V. It should be noted that these regulators will not operate effectively with a significant input-output voltage...

12v 5a power supply using lm338

A 12V power supply is an essential and useful resource for laboratories, as it is employed by a wide range of electronic circuits and devices. A 12V power supply circuit can be constructed based on specific ampere requirements. A voltage...

12V Battery Charger with SCR

This 12V SCR battery charger circuit is unique in several aspects, which contribute to its complexity. The 12V SCR (Silicon Controlled Rectifier) battery charger circuit is designed to efficiently charge lead-acid batteries while providing a reliable and stable charging process. The...

Switch Mode Power Supply

National Semiconductor has been producing and designing integrated circuits (ICs) for use in switch-mode power supplies for many years. The application of these devices is standard. National Semiconductor has established a significant presence in the design and manufacturing of integrated circuits...