Datasheets | Electronic Project Circuits

Posts Tagged ‘Datasheets’

LM3914 – Dot/Bar Display Driver

Features
Drives LEDs, LCDs or vacuum fluorescents
Bar or dot display mode externally selectable by user
Expandable to displays of 100 steps
Internal voltage reference from 1.2V to 12V
Operates with single supply of less than 3V
Inputs operate down to ground
Output current programmable from 2 mA to 30 mA
No multiplex switching or interaction between outputs
Input withstands ï¿½35V without damage or false outputs
LED driver outputs are current regulated, open-collectors
Outputs can interface with TTL or CMOS logic
The internal 10-step divider is floating and can be referenced to a wide range of voltages
General Description

The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display

Block Diagram

Source :: http://www.national.com/pf/LM/LM3914.htm

Related Links
More datasheets
LED Display
Dot bar Display
Circuit basic dot-bar Display for LM3914
LED VU Meter by LM339

Be the first to comment - What do you think? Posted by admin - May 29, 2007 at 1:47 pm

Categories: LED Flasher, Lighting Tags: Datasheets, dot bar Display, LM3914

LM741 – Op-AMP (Operational Amplifier)

General Description

The LM741 series are general purpose operational amplifiers which feature improved performance over industry standards like the LM709

IC LM723 – Voltage Regulator

Features
150 mA output current without external pass transistor
Output currents in excess of 10A possible by adding external transistors
Input voltage 40V max
Output voltage adjustable from 2V to 37V
Can be used as either a linear or a switching regulator

General Description
The LM723/LM723C is a voltage regulator designed primarily for series regulator applications
Source :: http://www.national.com/pf/LM/LM723.html