Author: psu

5V 10A 50W Offline Switching Power Supply

5V 10A 50W Offline Switching Power Supply
This is the switching power supply circuit diagram with 50W power output with a 5V voltage 10A current. It is a flyback converter operating in the continuous mode. The circuit features a primary side and secondary side controller will full-protection from fault conditions such as overcurrent. (more…)

Battery Discharge Monitor

Battery Discharge Monitor
Above circuit diagram is a battery monitor circuit which detaches the load when the battery is discharged, anticipating a deep discharge which could cause permanent battery damage. The battery is automatically reconnected when a battery charger or other DC source is connected across the load. Select a relay which requires less than 100mA coil current and with contacts capable of handling the load and charging currents. (more…)

Simple 400V DC Power Supply

Simple 400V DC Power Supply
This is a very simple 400V DC power supply circuit diagram, or, it may called as 230VAC to 400VDC converter. The working principle of this circuit diagram is very simple. You already knew the working principle of a bridge rectifier. This circuit is same as bridge rectifier and the working principle is also same. The fuse is used to protect the circuit, if the current is greater than 1 A. (more…)

Simple Photocell Power Supply using MAX630

Simple Photocell Power Supply using MAX630
This is a simple and easy build photocell power supply. It uses 8 pieces of photocell and single regulator IC of MAX630. This circuit capable to deliver either 4.8 or 7.2 V regulated at 15 mA with a 3-V input from a bank of photocells. R1 should be 453K Ohm for a 7.2-V output and 274K Ohm for a 4.8-Vdc output. Regulator efficiency of this circuit is about 70%. (more…)

Battery Charger Powered using Single Solar Cell

Battery Charger Powered using Single Solar Cell
This is the schematic diagram of battery charger circuit that powered using single solar cell. The circuit designed using MC14011B  manufactured by ON Semiconductor. CD4093 can be used to replace MC14011B. Supply voltage range : 3.0 VDC to 18 VDC. (more…)

1-15V DC Digital Power Supply with 15 Steps

1-15V DC Digital Power Supply with 15 Steps
This is a simple digital power supply circuit diagram to obtain variable DC voltage from 1.25V to 15.19V in reasonably small steps. The steps of up and down voltage can be down by press the up and down switch, and it use LED indicator to show the level of the output voltage. You can use DC input voltage between 20V and 35V. You must prepare a DC power supply before built this circuit. (more…)

Voltage Doubler from 6VDC to 12VDC

Voltage Doubler from 6VDC to 12VDC
This is the circuit diagram of voltage doubler, or it can be called DC to DC converter circuit, from 6 Volt DC become 12V DC. This dc voltage doubler circuit will need about 2A from the 6V input supply to produce the full 800mA at 12V for the power output. (more…)