Archive for category: Power Supply circuits

Variable DC Power Supply Circuit

Power Supply circuits | By: Diagram mania

Voltage range: 0.7 – 24V Current limiting range: 50mA – 2A Circuit diagram Parts: P1 500R Linear Potentiometer P2 10K Log. Potentiometer R1,R2 2K2 1/2W Resistors R3 330R 1/4W Resistor R4 150R 1/4W Resistor R5 1R 5W Resistor C1 3300µF 35V Electrolytic Capacitor (see Notes) C2 1µF 63V Polyester Capacitor D1,D2 1N5402 200V 3A Diodes […]

Basic UPS Power Supply Circuit

Power Supply circuits | By: Diagram mania

Description This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of electrical supply line failure the battery takes over, with no spikes on the regulated supply. Circuit diagram Notes: This circuit can be adapted for other […]

LM317 VARIABLE POWER SUPPLY Circuit

Power Supply circuits | By: Diagram mania

Follow all the safety precautions when working with mains voltage. Insulate all connections on the transformer. Circuit diagram Description: 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. It’s ideal for just about any application. This was […]

Fixed Voltage Power Supply Circuit

Power Supply circuits | By: Diagram mania

The fixed voltage power supply is useful in applications where an adjustable output is not required. This supply is simple, but very flexable as the voltage it outputs is dependant only on the regulator and transformer you choose. The maximum output current is 1.5A. Circuit diagram Parts C1 2200uF 35V Electrolytic Capacitor C2, C4 0.1uF […]

5,000W ultra-light, high-power amplifier, without switching-mode power supply Circuit

Power Supply circuits | By: Diagram mania

This circuit is of an 2x 2,500W RMS stereo amplifier, super-light and without switching-mode power supply. The circuit just shows a channel, and the power supply that it assists to the two channels. The audio circuit should be duplicated, but the power supply assists to the two channels without problems. A special care should be […]

Adjust negative power supply

Power Supply circuits | By: Diagram mania

7905 is a negative regulator.But we can use it as adjust negative power supply.The buttom circuit can adjust output from -5 to -30V when input is -5.5 to 35V. Example :Vin = -20 V Radj

Programmable power supply with LM317

Power Supply circuits | By: Diagram mania

.This circuit can program output voltage by turn-on/off transistors.When transistor turn on the resistor R will be connected to ground for determine output voltage.The maximum voltage of this circuit is 27V when input voltage is 28V. T1-T4 = 2N2222 or any NPN transistors This is the output voltage when one of A-D connected to Vin […]

1.2 to 20 V, 3A power supply with LM350

Power Supply circuits | By: Diagram mania

.This circuit use LM350 which is adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 3A over a 1.2V to 33V output range. They are exceptionally easy to use and require only 2 external resistors to set the output voltage. Further, both line and load regulation are comparable to discrete designs. Also, […]

0-30 VDC STABILIZED POWER SUPPLY WITH CURRENT CONTROL 0.002-

Power Supply circuits | By: Diagram mania

Copyright of this circuit belongs to smart kit electronics. In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic. General Description This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The […]

Αυτόματος φορτιστής συσσωρευτών μ

Power Supply circuits | By: Diagram mania

Με αυτό το κύκλωμα μπορείτε να αξιοποιήσετε έναν φτηνό φορτιστή μπαταριών μόλυβδου με ένα σύστημα που λείπει απ τους περισσότερους. Μιλάμε για ένα κύκλωμα αυτόματης διακοπής της φόρτισης όταν η τάση της μπαταρίας φθάσει τα 13,8V και αυτόματη επαναφορά της φόρτισης όταν η τάση της μπαταρίας είναι μικρότερη από 12,6V. Ο τελεστικός ενισχυτής 4 διατηρεί […]