LM3909 | Electronic Project Circuits

Posts Tagged ‘LM3909’

Light turning bike using IC LM3909

Usual already a bicycle has will no Light turning. If want to turn a car may be born dangerous can go up. Because of a car that drive to follow come to don’t know that turn thus. We should enhance the safety gives with one self with building light turning bike circuit this upward.
The work of the circuit be in usual time switch S1 will stay in a position OFF. If the circuit will turn to the right move switch S1 go to a position Right have power supply 1.5V, go to at IC1 which be IC1 work oscillator generator come out pin 6 ways change contact switch S1/2 make LED3,LED4 will flasher at the same time conversely. If turn to the left move switch S1 go to at a position Left frequency signal that pin 6 s of IC1 change contact switch S1/2 make LED1,LED2 blink at the same time. By the speed in something flasher depend on the value of C1 this circuit can work long ago. Because the circuit will work especial when open light turning only.

Be the first to comment - What do you think? Posted by admin - May 30, 2010 at 4:10 am

Categories: LED Flasher, Lighting Tags: bicycle lightings, Light turning bike, LM3909

Led display for battery low volt

This circuit uses just integrated number circuit LM3909 and capacitors outside. It work by use NiCad battery 1.25V sizes. or The dry cell is small-sized is other. The circuit can do to copy is like , prevent many the group. For use show winking according to want Battery Charger Circuit that add come to this use solar cell model silicon or Diode for battery Charger automatically is at day time.

Be the first to comment - What do you think? Posted by admin - November 26, 2008 at 8:35 am

Categories: Battery, Detector, LED Flasher, Meter Tags: battery tester, LED Flasher, LM3909, solar battery charger

LED Display for power supply 6V or 15V by LM3909

This circuit uses the integrated circuit LM3909 perform be LED Flasher and Oscillator. For Drive LED give Flasher on – off with Frequency 2Hz. For formed show of office equipment with Battery For battery 6V size Capacitors. CT be valuable 400uF, Rs be valuable 1000ohm and RFB be valuable 1500ohm. For voltage 15V size the value of , CT equal to 180uF Rs equal to 3900ohm and RFB equal to 1000ohm. The useful life of battery long because of the circuit uses a little electricity.

Be the first to comment - What do you think? Posted by admin - September 29, 2008 at 8:14 am

Categories: Detector, Lighting, Meter Tags: led voltage indicator, LM3909