l200 voltage regulator soft start circuit

This simple mobile voltage regulator circuit may save your two-meter or CB transceiver if the voltage regulator fails. The 2N3055 should be heat-sinked if the current drawn by the rig exceeds 2 A during transmission. This circuit will do little...

10 Amp 13 8 Volt Power Supply

The circuit includes a current limiting feature that is more reliable than most commercial units. It employs three pass transistors that require heat sinks. Resistor R9 allows for fine-tuning of the output voltage to precisely 13.8 volts, while the resistor...

Applications with Voltage Regulator L200 circuit

There are two regulator circuits that utilize the L200 integrated circuit from SGS-Thomson to regulate voltage and current. In circuit Fig. 1, the output voltage can be adjusted using the variable resistor RV1. In Fig. 2, both output voltage and...

12-16V-converter

Many devices operate from a car's 12-V electrical system. Some require 12 V, while others need a lower voltage. An automobile battery's output can vary from 12 to 13.8 V under normal circumstances. The load requirements of the device may...

Charging capacitor bank with current limiting circuit

A current limiting circuit is designed to select a maximum current through a load, set to a maximum of 480 mA. As the load resistance increases, the series equivalent resistance (SER) of the limiting circuit decreases. When charging a capacitor...

Logic PSU with Overvoltage Protection

The 5 volt regulated power supply for TTL and 74LS series integrated circuits has to be very precise and tolerant of voltage transients. These ICs are easily damaged by short voltage spikes. A fuse will blow when its current rating...

9 Volt 2 Amp Power Supply

This circuit primarily relies on the regulator for its functionality. The 78S09 regulator can provide a continuous output of up to 2 amps while ensuring a low noise and well-regulated supply. Although the circuit can operate without additional components, a...

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...

12 Volt 30 Amp Power Supply

This power supply utilizes a single 7812 integrated circuit (IC) voltage regulator in conjunction with multiple external pass transistors to provide output load currents of up to 30 amps. The circuit design incorporates a 7812 voltage regulator, which is known for...