0-30V 3A Adjustable DC Supply
Power supply
This is cheap adjustable 0-30V 3A Laboratory DC Power Supply circuit. It is high efficiency regulator circuit by using IC regulator UA723 and TIP3055 as power transistor so easy to install. It is designed to protect over current load maximum 3A Technical data -Need to use transformer : 12-0-12V 4A. -Voltage output adjustable : 0-30VDC -Current maximum : 3A How does it works As Figure 1 circuit diagram. AC from transformer goes through bridge rectifier diode set which compress of 4 bridge diode changing AC to DC by having C1 as a filter before sending to regulator circuit. Parallel R …
Cheap adjustable  0-30V 2A Laboratory DC Power Supply
Power supply
This 0-30V power supply is the variable voltage Regulator at 2A max, by used IC-723 for control volt stable regulated. The 2N3055 power transistor for boost up current to 2 Amp. It suitable for general electronics work shop. Because it is a simple circuit and easy circuit. In addition to this has the over current protection as well. This circuit is designed using LM723 voltage regulators IC –DIP 20pin maintain a constant voltage, and a power transistor as the way through the current to can be used up as wanted. The circuit was designed also with overload protection or short …
0-30V,0-2A adjustable  voltage and current regulator
Mini Projects
This is the 0-30V,0-2A adjustable voltage and current regulator that developed from the cheap adjustable 0-30V 2A Laboratory DC Power Supply project using LM723 is used widely, for a long time. This project can control the amount of current flow is maximum. We modified the circuit as circuit in Figure 1. Which this circuit, the maximum current is adjustable from 0 – 2A. How it works Figure 1 we add the current controller include transistors Q4,Q5,Q6 and Q7, and few others parts. The potentiometer VR2 is controlled the maximum amount of current flow. Normally, we adjust VR2 at Q5 work, …