Electrical Characteristics (LM). (Refer to the test circuits. 40qC TJ qC, IO = mA, VI = 19V, CI = PF, CO = PF, unless otherwise specified). LCV LM L Voltage Regulator IC + 12V A. 78xx (sometimes L78xx, LM78xx, MC78xx) is a family of self-contained fixed linear voltage regulator integrated circuits. The 78xx family is commonly used in.

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The 78xx family is commonly used in electronic circuits requiring a regulated power supply due to their ease-of-use and low cost.

Variable Power Supply with LM – Electronics-Lab

On this project I use the LM in TO footprint, which can be screwed to the rear of a heatsink for better heat icc. Retrieved from ” https: This has given me a start and is better then many others I have seen. Articles needing additional references from January All articles needing additional references.

You will get better heat conduction if you use thermal paste between the heatsink and LM78xx before screwed together. Leave a Reply Cancel reply. These devices support an input voltage anywhere from around 2. In other projects Wikimedia Commons.

The 78xx line are positive voltage regulators: January Learn how and when to remove this template message. If you can do better, create your own site!

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78xx – Wikipedia

LM78xx can be easily found in stores with electronic materials. From Wikipedia, the free encyclopedia. It is a component in switching regulator designs and is not a linear regulator like other 78xx devices.

There is a related line of 79xx devices which are complementary negative voltage regulators. Encyclopedia of Electronic Components Volume 1: The LM78S40 from Fairchild is not part of the 78xx family and does not use the same design.

This article needs additional citations for verification. I designed this variable power supply which is based on the famous series of voltage regulator LM78xx. This page was last edited on 5 Decemberat The bridge rectifier is a classic 2KVV. Learn how your comment data is processed. For the years, see 8th millennium.

The R3 can be placed in your project box and can be replaced with a potentiometer of similar price. Cool Projects for Open Source Hardware.

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5pcs L7812CV LM7812 L7812 7812CV 7812 Voltage Regulator IC TO-220

You may choose the appropriate bridge rectifier according to your requirements. This site uses Akismet to reduce spam. Industrial Electronics and Control. Some devices provide slightly different voltages than usual, such as the LM78L62 6. Mastering the If Pi. The SR from Datel is a full switching power supply module designed as a drop-in replacement for 78xx chipsand not a linear regulator like the 78xx ICs. Unsourced material may be challenged and removed.


Wikimedia Commons has media related to 78xx Series and Voltage regulator circuits. Now be honest Spili!

This project is a simple variable power supply using the famous LM regulator IC. The is the most common, as its regulated 5-volt supply provides a convenient power source for most TTL components. It consists of two boards, the main board which includes the regulator, capacitors, bridge rectifier and potentiometer and a second board that includes the mains tranformer, the fuse and a switch.

Thanks for your comments. The variable resistor R3 varies the output voltage Vout. Views Read Edit View history. Everobody on the internet has copied it from somewhere.

The second board is for the transformer, the board contains the base for the primary fuse and one on-off switch for V mains voltage.

The electrical characteristics can be found here.