Dual Regulator power supplay +12 dan - 12

This is of a dual regulated that provides +12V and -12V from the AC mains. A regulator like this is a very essential tool on the work bench of an electronic hobbyist.

Transformer T1 steps down the AC mains voltage and diodes D1, D2, D3 and D4 does the job of rectification. Capacitors C1 and C2 does of filtering.C3, C4, C7and C8 are decoupling capacitors. IC 7812 and 7912 are used for the purpose of voltage regulation in which the former is a positive 12V regulator and later is a negative 12V regulator. The output of 7812 will be +12V and that of 7912 will be -12V.

Skema Rangkaian Dual Regulator power supplay

Use Transformer 15-0-15 V, 1A secondary step-down transformer.
Capacitor C1,C2,C5 and C6 must be rated 50V or more.



IC regulator 78xx (7812) Description

The LM78XX series of three terminal regulators is available with several fixed output voltages making them useful in a wide range of applications. One of these is local on card regulation, eliminating the distribution problems associated with single point regulation.

Features IC LM7812

Output current in excess of 1A
Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18 , 24V
Internal thermal overload protection
No external components required
Output transistor safe area protection
Internal short circuit current limit

Absolute Maximum Ratings IC LM7812

Input Voltage (VO = 5V, 12V and 15V) : 35V
Operating Temperature Range (TA) : 0°C to +70°C
Maximum Junction Temperature : 150°C
Storage Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 10 sec.)




IC regulator 79xx (7912) Description

The LM79XX series of three-terminal negative regulators are available with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shutdown and safe operating area protection, making it essentially indestructible.


Features IC LM7912• Output Current in Excess of 1A
• Output Voltages of -5, -6, -8, -9, -10, -12, -15, -18 , -24V
• Internal Thermal Overload Protection
No external components required
• Short Circuit Protection
• Output Transistor Safe Operating Area Compensation


Absolute Maximum Ratings IC LM7912

Input Voltage (VO = -5V, to 15V) : 35V
Operating Temperature Range (TA) : 0°C to +70°C
Maximum Junction Temperature : 150°C
Storage Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 10 sec.).
.

5 Volt Regulator menggunakan Dioda Zener

 

Regulator Dioda Zener

The regulator circuit is basically used zener regulator is configured with an NPN transistor to produce a large amount of cash. the regulator working on the zener breakdown voltage so that it produces the same output with the zener voltage. VBE is the base-voltage emitor of the size of the transistor Q1 between 0.2 - 0.7 volt depending on the type of transistor used.

Rangkaian regulator menggunakan dioda zener

Components List:
* R1 = 560 ohms
* C1 = 1000uF/40V
* C2 = 10uF/25V
* C3 = 330nF
* Z1 = 5.7 V
* Q1 = ECG184, NTE184

This regulator series of functions to change the voltage 12 to be 5 volts. The core of this series is the zener diode. due to a fall in voltage Zener diode 12 will be 5.7 volts. voltage in 5.7 volt electrical currents strengthened by taransiator Q1

To get a different output voltage you can change the zener diode as needed. For example, if you need a converter from 12 to 9 volt change eat Zener Diode 5.7 to 10 volts

Variable Voltage Regulator Circuit Using IC L146

This reguator circuit is designed for general purpose use. Advantages of the circuit are first the voltage can be adjusted from 0V to greater and second it does not require a double sided secondary winding transformer. For high voltage outputs you can use L146 or alternatively if you need lower voltage outputs you can use IC 723. 

L146  Variable Voltage Regulator Circuit

Regulation voltage for both integrated circuit is at least 2V. R3, R4, R5 and R6 resistors prevent this limitation and keep the output voltage at 0 level with the help of P2 potentiometer. If the input voltage is less than required, this resistors provides sufficient potential between 4 and 5 numbered pins.

5 Volt Switching Regulator Circuit LM2678-5.0

 

This is the circuit diagram of a 5V switching regulator based on the IC LM2678. The LM2678 series of regulators are monolithic integrated circuits which provide all necessary functions required for a buck switching regulator and can drive up to 5A loads. The IC has more than 90% efficiency and has excellent load and line regulation. The LM2678 is available in three fixed output voltages (3.3V, 5V, 12V) and an adjustable output version. The IC is also packed with a handful l of features like thermal shutdown, current limiting and ON/OFF control.

Skema Rangkaian 5 Volt Switching Regulator LM2678-5.0

LM2678-5.0 Pinout

Note:

• The circuit given here is based on the version LM2678-5.0 which gives an output of 5V.
• The power supply for the circuit can be anything between 8 to 40V DC.
• The feedback wiring must be placed as away as possible from the inductor L1.
• Do not use loads that consume more than 5A.
• A heat sink is seriously recommended for the IC.

5 volt Regulator Menggunakan IC 7805

 

The IC 7805 provides circuit designers with an easy way to regulate DC voltages to 5v. Encapsulated in a single chip/package (IC), the 7805 is a positive voltage DC regulator that has only 3 terminals. They are: Input voltage, Ground, Output Voltage.

Skema Rangkaian Regulator IC 7805

Although the 7805 were primarily designed for a fixed-voltage output (5V), it is indeed possible to use external components in order to obtain DC output voltages of: 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, 24V. Note that the input voltage must, of course, be greater that the required output voltage, so that it can be regulated downwards

Features IC 7805
• Output Current up to 1A
• Output Voltages of 5 Volt
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection

Input Voltage........................................ 35
Thermal Resistance Junction-Cases (TO-220)40......... 5 °C/W
Thermal Resistance Junction-Air (TO-220)............. 65 °C/W
Operating Temperature Range (KA78XX/A/R)............. 0 ~ +125 °C
Storage Temperature Range............................ -65 ~ +150 °C

9 Volt Regulator Menggunakan TIP31

This is a DC Power Supply 9 Volt Regulator using transistors TIP31, which can provide a flow of about 1 Amp arrived in 2Amp. transistors of this type is very easy to find in stores electronic component sales very cheaply, about RP 1500. VR1 can be decorated with both for a 9V DC voltage transistor can be improved according to TIP31, a friend can use another number right as TIP41, MJE3055, 2SC1061, etc. But the heat sink should be kept in accordance with. The other details, see the circuit yes.

Skema rangkaian 9 volt regulator menggunakan TIP31

Note:

• use tranformator 12Vot 2 ampare
• TIP31 must Transitor give good cooling
• Use the capacitor (elco) with voltage 16volt

Absolute Maximum Ratings Transistor TIP31

VCBO Collector-Base Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Collector-Emitter Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Emitter-Base Voltage 5 V
Collector Current (DC) 3 A
Collector Current (Pulse) 5 A
Base Current 1 A
Collector Dissipation (TC=25 C) 40 W
Collector Dissipation (Ta=25 C) 2 W
Junction Temperature 150 C
Storage Temperature - 65 ~ 150 C

6 - 9Volt Regulator Berbasis Op-Amp 741

The following is a series regulator power supply 6V to 9V. Preventing that have something through the circuit in. The parts that perform to heal strong a picture uses the integrated circuit op-amp 741 multi-purpose numbers in the character Comparator mode. The circuit protects the output transistors compose TR1-TR3. By the transistor TR1 perform straddle the acknowledge voltage resistors R3. Which have current work when about 250mA or more than flow through R3 when TR1 work truck loads C3 as a result will do way R5 10K package Resister values and thereafter 2 second railings. The voltage its will encourage enough. TR2 Cooperate TR1 which assemble Tiristor be rapidities are many onely. This circuit consumes current in the condition calmly do not arrive at Current 5mA and will fully protect a part 12mA railing to have sizes only.

Skema rangkaian regulator berbasis Op-Amp 741

Absolute maximum rating Op-Amp 741

• Supply voltage (VCC) ±22 V.
• Differential Input Voltage (Vid ) ±30 V.
• Input Voltage (Vi ) ±15 V.
• Power Dissipation (Ptot) 500 mW.
• Storage Temperature Range (Tstg) -65 to +150 °C.

Rangkaian Regulator 3 volt menggunakan IC LM317

 

This is based circuit of the LM317 adjustable voltage regulator with a maximum output of 3V/1.5A. The output voltage depends on the Pin 1 (pin ADJ) of IC LM317 or R1 and R2 values, so the circuit Can be modified to use with a maximum output of greater than 3V. while for the maximum output current is related to the package options.In this circuit, LM317T, Which is capable of transferring up to 1.5A, is used.

Skema rangkaian regulator 3 volt

When we adjust the R2 to 1.2K then the output becomes nearly 1.56V which is a typical battery voltage level that can be used in development projects.

R6 sets the current of the current source so it operates as a zero adjustmend resistor. When the resistor R2 is set to zero, adjust R6 to see zero voltage at the output. R5 protects the transistor BCW33. Red LED is used as a light indicator.

IC LM117 pinning


The LM117 is a series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators.

LM723 - Variable Voltage Regulator circuit

This is circuit variable voltage Regulator 3-30V at 3A max, by used IC LM723 for control volt stable regulated. The 2N3055 power transistor for boost up current to 3 amp. The VR1 used control output 3V to 30V. It suitable for general electronics work shop. Because it is a simple circuit and easy circuit.

LM723 -  Variable Voltage Regulator circuit

Note:

• T1 can be a 220V primary, 32VCT secondary, 3A step down transformer.
• MJ3001 power transistor must be fitted on a proper heat sink.
• Output voltage can be adjusted by using the POT RV1.

Variable Voltage Regulator Circuit Using IC L146

 

This reguator circuit is designed for general purpose use. Advantages of the circuit are first the voltage can be adjusted from 0V to greater and second it does not require a double sided secondary winding transformer. For high voltage outputs you can use L146 or alternatively if you need lower voltage outputs you can use IC 723. 

L146  Variable Voltage Regulator Circuit

Regulation voltage for both integrated circuit is at least 2V. R3, R4, R5 and R6 resistors prevent this limitation and keep the output voltage at 0 level with the help of P2 potentiometer. If the input voltage is less than required, this resistors provides sufficient potential between 4 and 5 numbered pins.