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The key highlights of the circuit are: wide range output: 0.1 to 50 volts excellent load regulation: 0.005% between 0 and 1 amp, decent line regulation: 0.01%, reduced output disturbance: superior to 250 microvolts. Colvin is presented below for the viewer assessment: 2N3055 Wide Range Variable Voltage Regulator
#2n3055 transistor pdf zip
The design features an over-current shut down with LED indication.įor PCB Design and other Related Data, you can Download the following ZIP File:Īnother Similar Power Supply Design as Referred by Mr. William C. The revised and simplified design can be viewed in the following diagram: The above designs were assessed and simplified with more effective results by Mr. The above design was inspired from the following circuit which was designed and presented in the elektor electronics magazine by the elektor engineers: Simplified Variable Power Supply Design using 2N3055 and 2N2222 Transistors Original Transistor Power Supply Diagram: If you have any doubts regarding this variable voltage and current power supply circuit using transistor 2N3055 circuit please do not hesitate to ask then through the comments below. P1 is set to choose the maximum range within the value that’s marked or identified by the resistor R4. The value of R4 is specifically becomes responsible for defining the maximum allowable output current. Therefore in this variable power supply circuit using 2N3055 transistor, the transformer being a 0 – 40 V, the output becomes variable right from 0.6 to 40 volts maximum, that’s very handy indeed.įor implementing the current control feature, T3 along with P1, R5 and R4 are involved. If any other specific minimum value is required then the diode can be replaced by zener diode having the required specified value. The inclusion of D1 makes it sure that the voltage can be lowered right down to 0.6 volts, which happens to be the forward voltage drop of the diode.
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Circuit Diagram How it WorksĪ keen look at this 2N3055 based variable voltage current power supply circuit using transistor 2N3055 reveals that it’s actually only an ordinary stabilized power supply circuit, however it yet still provides you with the proposed features very efficiently.The voltage variations are made by using the preset P2, through a feedback configuration employing the components D1, R7, T2 and P2.
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Here, a 680Ω resistor acts as a current limiting voltage source. The signal then passes through a voltage regulator section using a 12V Zener diode. After which the signal passes through a smoothing capacitor C1 (5000μF) to remove any undesirable noise. On providing an AC input from a 230V/15V 5A non-CT transformer, The stepdown AC signal passes through a bridge rectifier which translates the AC signal into a rippling DC.