Variable Regulator | Electronic Project Circuits

Posts Tagged ‘Variable Regulator’

1-20V 10A adjustable dc power supply by LM338

1.2V-20V 10A adjustable dc power supply by LM338
A friend of me side radio amateur office. He wants Variable Regulate Power Supply high current about 10A go up. I then advise this circuit , because build easy. Use IC LM338 and IC LM107 again normal IC LM338 have current about 5A then must use 2 pcs. Make enhance current get be 10A besides. Still three fine VR1 make output modify since 1.2V to 20V cover usual usability sir. A friend of me has may glad that see circuit this idea. You may think like with that be lucky.

Be the first to comment - What do you think? Posted by admin - August 6, 2008 at 2:03 pm

Categories: High current power supply, Variable Regulator Tags: High current power supply, LM338, Variable Regulator

LM317 Variable Regulator 30V 1A

If you want used easy variable regulator power supply voltage 0-30V at current 1.5A max. I am like this circuit, because it is small but very good.
I uesd IC – LM317T it is quality products ic variable regulator,so i like make in other power circuit.
The LM317 or LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range.
I made use of a 24Vac 1A transformer,The output of the transformer is rectified by diode 1N4002 or equiv ,and smoothed filter using 2200uF capacitors.
The float-voltage measured here for the 24V transformer was 34V-40V,it is unregulated DC voltage.
The VR1 is control output dc voltage 0V(1.25V) to 30V(32V) or 37V maximum voltage at 1.5A max all range.
It is advised that you use this ic with a suitable heatsink.

Main Part
– IC1 = IC LM317T or KIA317
D1-D4 = Diode 1N4002 or 1N4004 or 1N4007 x 4
C1 = Capacitors electroly 2,200uF 35V
VR1 = Variable Resistor 5K(B)
Other detail part,Please see in image.

Be the first to comment - What do you think? Posted by admin - May 15, 2008 at 2:35 pm

Categories: Power supply, Variable Regulator Tags: Adjustable power supply, LM317 power supply, Variable Regulator

5V to 24V DC Variable Regulator by 7805

The output voltage can be adjusted (varied) from 5v to 24v via a potentiometer connected to the common line of the regulator. The input voltage and heatsinking of the regulator must be sufficient for the output voltage and current. The output may not deliver more than 100mA @ 5v due to the heat produced by the regulator if the input voltage is say 24v – 36v. This is one of the disadvantages of a variable power supply if this design.