Various diagram

A truly timeless circuit. LM317 is a versatile and highly efficient 1.2-37V voltage regulator that can provide up to 1.5A of current with a large heat sink. Its ideal for just about any application. This was my first workbench power supply and I still use it.

 LM317 variable power supply Circuit Diagram

Since LM317 is protected against short-circuit, no fuse is necessary. Thanks to automatic thermal shutdown, it will turn off if heating excessively. All in all, a very powerful (and affordable!) package, indeed.

Although LM317 is capable of delivering up to 37V, the circuit pictured here is limited to 25V for the sake of safety and simplicity. Any higher output voltage would require additional components and a larger heat sink.

Make sure that the input voltage is at least a couple of Volts higher than the desired output. Its ok to use a trimmer if youre building a fixed-voltage supply.Problems:Follow all the safety precautions when working with mains voltage. Insulate all connections on the transformer.

Possible uses:Variable workbench power supply, fixed-voltage supply... Just about any possible application when no more than 1.5A is necessary.

Lead Acid Battery Charger circuit is highly recommended to recharge battery. And recommended that maximum voltage 24V 7A battery, so you can recharge a battery simultaneously. Battery Charger has been little use of several components such as diodes, electrolytic capacitors, transistors, resistors, and also for strengthening of the voltage and current stresses. And also do not forget to lowering electric voltage 220V to 20V-35V 5-10 Ampere suitable for Lead Acid Battery Charger circuit.

for Figure Schematic circuit Lead Acid Battery Charger, you can see below :

R1               = 1Ω 2w

R2               = 100Ω

R3               = 220Ω
R4               = 10KΩ Trim

C1 - C2       = 1000µF 50V

C3               = 470µF 50V

Transformer I mentioned above can use the 5A - 10A with a secondary voltage of about 20Volt-35Volt AC. My advice to IC please be cooler, because when the circuit and well even IC LM317 works it causes IC hot. Also to assemble the components using PCB (Printed works Circuit Board) qualified with a good track, as well as the components that will be used not forget to check back whether good or not, so it will also produce good results.

1. When it detects a relatively high light intensity, the based and emitter voltage of T2 increase When the base voltage of Tz exceeds 2.7 Vj R4 limits the emitter voltage to 3.9V due to the constant current of 5.7 mA.
2. This causes the voltage at the emitter of this pnp darlington transistor to be about LZVZ The voltage across Rs is the reference potential, 1.25 W of the Type LM3l7 regulator, so that lies about 5.7 mA, and the output voltage, UO, of the circuit is when T1 detects darkness.
3. The maxi- mum output current is of the order of 700 mA when IC1 is adequately cooled. The input voltage range of the circuit is 8 to 15 VC
4. This is a light dependent voltage source that regulates the supply to 7-segment dis- plays in accordance with the intensity of ambient light.
5. The sensitivity of the regulator is adjustable with P1.
6. T2 no longer conducts and the output voltage of the circuit is 5.7 L because the total resistance between the regulator output and ground is Rs+Ra+R4= 1,000 Q, and the current through it is still 5.7 mA.
7. The regulating action is positive, a higher ambient light intensity results in the circuit raising the supply voltage to the displays. Phototransistor T1 does not conduct when it detects darkness, and the base of T2 is therefore grounded via R2 and Pt 

LM317 Dispaly Intensity Controller Circuit is shown below: