Search Results for : LM317

This project is a solution to power up most of devices or projects requiring dual (+/-) adjustable power supply. The circuit is based on LM317 positive and LM337 negative voltage regulators. LM3X7 series of adjustable 3 terminal regulators is capable of supplying in excess of 1.5A...

This project provides a variable output power supply ranging from 1.2 to 37 V @ 1.5 A. Uses industry populer LM317 in TO3 package for delivering variable output voltage. Specifications  Input 40 VDC or 28V AC 2Amps Output : 1.2 to 37 V @ 1.5 A regulated low ripple DC...

This project provides a variable output power supply ranging from 1.2 to 37 V @ 1.5 A.  Uses industry popular LM317 in TO3 package for delivering variable output voltage. Specifications  Input 40 VDC or 28V AC 2Amps  Output : 1.2 to 37 V @ 1.5 A regulated low ripple DC...

The circuit presented here is based on LM317. Generally, LM317 is known as a linear regulator IC, but here the circuit operates as a switching regulator. This circuit operates by transferring energy from the input to the output by using a solid state switch. Power Efficiency of a...

In this project we design low cost high performance programmable home security system using few LDR’s as an input sensors. When above sensor(s) get triggered system may dial the user specified phone number (using build-in DTMF generator) and activate the high power audio alarm and...

by Rafael Garcia-Gil @ edn.com: For many applications that require power-supply currents of a few amperes or less, three-terminal adjustable-output linear voltage regulators, such as National Semiconductor's LM317, offer ease of use, low cost, and full on-chip overload protection. The...

Using a Veroboard mother-board about the same size as the battery holder, a daughter-board was added to hold the remaining parts. Schematic Parts List IC1 ……. CD74HC132 B1 ……... Two AAA alkaline cells, with holder C1, C3 … 1nF (0.001uF) or 2.2nF (0.0022uF) C2...

Introduction In this project we design low cost high performance programmable home security system and there is no need to contact a company like Safemart home security for setup. This system uses a few LDR's as input sensors. When above sensor(s) get triggered system may dial...