Circuit Diagram 0-30V 3A Adjustable DC Supply using uA723 IC

UPSToday. - This is Circuit Diagram 0-30V 3A Adjustable DC Supply using uA723 IC like in Figure 1. below. The circuit schematic will provides a constant regulated output 0-30VDC from the input voltage 12VAC and get 3A.

Circuit Diagram

Figure 1. Circuit Diagram 0-30V 3A Adjustable DC Supply using uA723 IC (Source: Eleccircuit)

Component Parts

1. IC1_____uA723__HIGH PRECISION VOLTAGE REGULATOR
2. TR1_____BD140___80V 1.5A PNP Transistor
3. TR2_____TIP3055___60V 15Amp High Speed Switching Silicon transistor
4. TR3_____CS9012___40V 0.5A PNP Bipolar Transistors
5. D1-D4___1N5401____100V 3A Rectifier Diodes
6. C1______4700uF 50V____Electrolytic capacitors
7. C2______680pF 50V _____Ceramic Capacitors
8. C3______100uF 50V_____Electrolytic capacitors
9. C4____________0.1uF 50V_____Ceramic capacitors
10. R1-R5_________1 ohms___0.5W 5% Resistors
11. R6___________50 ohms___0.5W 5% Resistors
12. R7,R9,R12,R13___100K______0.5W 5% Resistors
13. R8_____________2.7K______0.5W 5% Resistors
14. R10____________10K______0.5W 5% Resistors
15. R11_____________5K______0.5W 5% Resistors
16. VR1____________5K___Potentiometer
17. T1______12V-CT-12V, 4A transformer

Description

Circuit diagram like in Figure 1. is Circuit Diagram 0-30V 3A Adjustable DC Supply using uA723 IC. According Eleccircuits site that publish this circuit describe that 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 value (R1-R5) will be decreased to 2 ohms to detect voltage. If there is over 3A. The voltage at the base is 0.6 volts, making TR3 works. They will high voltage at the collector of TR3 and connecting with the base of TR1 making TR1 unworkable, voltage output in down respectively.

Please read more about Circuit Diagram 0-30V 3A Adjustable DC Supply using uA723 IC from original article using link [Here],

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