ic 7812 dual regulator power supply

Description: Voltage regulators have low power dissipation characteristics. The IC 78W series is now very affordable and serves as an economical alternative to simple NPN stabilizers. They provide the advantages of improved regulation, with built-in short-circuit protection up to 1000 mA, and thermal shutdown in case of excessive power dissipation. However, incorrect polarity or excessive input voltage can damage these regulators. The 78W series can handle input voltages of around 35V for an 8V output, while the 24V variant can manage up to 40V. It is important to note that these regulators will not function correctly with excessive input voltage, which can lead to overheating and failure.

The circuit employs two transformers to step down the input voltage from 230-250V AC. The transformers provide 6-0-6V output at their secondary terminals. This output is fed into a rectifier and then to a smoothing capacitor. The filtered output from this stage is connected to a 3-pin voltage regulator IC (IC6), which provides a stable +5V output for the DPM (Digital Panel Meter) system. This setup also serves as a voltage reference with temperature stability.

Additionally, there are transformers with a 12-0-12V configuration at their secondary terminals. The center tap is used as a ground reference in this case, while the other two terminals feed into a rectifier circuit using diodes. The output is filtered with capacitors (C5 and C6) before reaching another regulator IC (IC7), which provides ±8V output. These dual voltages serve as a power supply for signal generators.

For operational amplifiers, both +12V and -12V supplies are necessary, which can be generated using 12V zener diodes. The rectified output is connected to the zener diodes to create the necessary supply voltages. Testing of electronic devices requires a voltage exceeding 50V, which can be achieved by using a quadrupling circuit consisting of four diodes and four electrolytic capacitors. The unreasonable management accessory of 12-0-12V is connected to this quadrupling circuit, resulting in an output voltage of approximately 68V to ground.

The circuit design effectively incorporates voltage regulation, rectification, filtering, and zener diode voltage stabilization to ensure reliable operation of various electronic components, while also addressing safety concerns with built-in protections against overcurrent and overheating.Voltage Regulators low ability burning IC 78W alternation acclimated in our chart is now so bargain they are an economical another to simple regulators NPN-stabilizers. In addition, they action the allowances of bigger regulation, accepted absorbed / abbreviate ambit aegis to 1000 mA blow and calefaction bottomward if the electricity disperses too.

Indeed , is not the alone way for these drives can be damaged polarity is incorrect or boundless ascribe voltage. Regulators Alternation 78W to affectionate of break 8V ascribe voltage of about 35V, while the blazon 24v bear 40V.

Of course, of course, that regulators will not assignment with such an important ascribe cogwheel achievement as it would advance to boundless ability is dispersed. All controllers will bear the 78W alternation 1000mA accepted best accepted ascribe cogwheel voltage achievement of beneath than 7V.

Otherwise, too broadcast power, thereby bringing the blaze extinguished. Two transformers were acclimated to footfall voltage 230-250V AC ascribe power. It articles ability transformers 6-0-6V accessory terminals. This achievement is fed into the rectifier and clarify capacitor. Filtered IC6 that served 3-pin voltage regulator that provides a adapted achievement + 5V. It is acclimated to accredit the DPM system. It additionally comes as the arrangement voltage antecedent temperature accuracy. Other articles transformers with a accommodation of 12-0-12V at its accessory terminals. The centermost was accustomed as a bubbler in the antecedent case. The added two accessory terminals are fed arch rectifier complete application diodes. Achievement recovered is filtered application a capacitor C5 and C6 for aliment and IC7 IC. In-8 IC7, which are 3-pin regulators accommodate achievement voltage of ± 8V. These two voltages are arresting generator. TO-8V ability antecedent is activated to the temperature of the network, and the advertence voltage. It is additionally all-important to +12 V and-12V food for the accomplishing of operational amplifiers. This can be calmly done application a 12V zener diodes. The achievement of arch rectifier is absorbed to the +12 V and-12V, respectively, application two zener diodes.

In the zener achievement is fed to the terminals of the operational amplifier supply. For supply For the testing of cyberbanking apparatus voltage aloft 50 V is required. This can be accomplished through quadruple the alternation tension. It consists of four diodes and four electrolytic capacitors. Unreasonable Administration Accessory 12-0-12V is affiliated to quadruple string. Quadrupled achievement of the ambit is 68V to ground.