Led Voltage Indicator | Electronic Project Circuits

Posts Tagged ‘led voltage indicator’

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

Very Simple Voltage Level Indicator

Today we come to see Voltage Level Indicator in model easy most. It is use easy part electronics only. The Zener Diode, Resistor , and , LED as a result can show already. By in each the circuit LED stick bright when V+ go up arrive at Breakdown voltage. And Vz of Zener diode +VLed should use RS for LED one by one. The circuit on the right will testify read the value is Bar Graph. When Zener Diode quietly enhance the value Vz . This circuit may is is simple good may advantage for friends , please sir.

Be the first to comment - What do you think? Posted by admin - September 18, 2008 at 7:12 am

Categories: Detector, Meter Tags: led voltage indicator, level voltage indicator

Battery 1.5V or 3V Monitor using LM3909

We come to add LED Flasher for Monitor the electric current of battery 1.5V and 3V. By use the integrated circuit LED Flasher or Oscillator. By the rate something flasher equal to 2V. This circuit eats electric a little current poor age the work of battery long can’t be like be usable. If friends use battery 3V as a result liberate pin 1 float keep. I hope that a friend may apply with Battery 1.5V or 3V Monitor Circuit , please sir.