Rongge

The current drain of the regulator is minute compared with that of, say, a 78L05: at an input voltage of 9 V and open-circuit output, it is just under 50 µA. The circuit consists of a straightforward bandgap reference based on T1 and IC1, followed by an amplifier formed by IC2 and T1. The reference voltage is about 1.22 V, which is raised by IC2 to 5 V. The output voltage can be set to exactly 5 V with P1. The input voltage may lie between 6.5 V and 30 V. The maximum output current with the present configuration and component values as specified is about 10 mA. For optimum performance, T1a and T1b need to be identical, which is why a dual transtor Type MAT02 is used. Other types that may be used are the MAT01, SSM2210 or LM394. In principle, two standard BC transistors may be used, provided they are selected for identical threshold voltage. Circuits IC1 and IC2 are programmable op amps Type OP22. In the case of IC2 this has the benefit that the peak output current can be set readily by...

5V DC REGULATED PHONE CHARGER ELECTRONIC DIAGRAM Regulated phone charger which is used as an emergency charger for mobile phones with source from ordinary batteries, and works with 1.5V input DC voltage. At 5V, it can provide output to 70mA. If the current is drawn, the voltage will be drop. A006 microcontroller is used to create square wave which used to drive the Field Effect Transistor BBV93.

This is the Simple 5V POWER SUPPLY USING 7805 IC FROM 230V AC MAINS circuit Diagram.Almost all digital circuits are works under 5V power supply. Here we are going to discuss on How to Generate  5V from 230V A.C supply. Digital IC’s, Microcontrollers, MicroProcessors and some basic circuits are generally powered by a 5V DC voltage. By using this project, you can eliminate the need of a battery in common circuitries. The circuit is simple to construct and maintain as it includes the following parts:- COMPONENTS USED Transformer  9V/2A  1 Regulator IC  7805  1 Diodes   1N4007  4 Capacitor   470uF,50V 1            0.01uF  2 Simple 5V POWER SUPPLY USING 7805 IC FROM 230V AC MAINS Working Principle of 5V Voltage Source The circuit consisting of a 9V stepdown transformer, voltage regulator IC(7805) and some capacitors, used for filtering purpose. The figure given below shows the basic block...

1.5V POWERED LED FLASHER ELECTRONIC DIAGRAM It is a charge pump design. This is where a capacitor (electrolytic) is allowed to charge and is then raised higher and allowed to discharge into a load. The load sees a voltage that can be higher than the supply.