Led Display | Electronic Project Circuits

Posts Tagged ‘led display’

Strange LED sequencer

This deceptively simple sequencer actually pulse width modulates the LEDs as it fades from one LED to the next. Bulbs will last much longer when driven in this gentle manner. Add MOSFETs or transistors to the outputs if you wish to drive bulbs. You can reconfigure the three capacitors from a wye configuration to a delta configuration, or you can remove one of them entirely and the circuit will still function. Use high efficiency LEDs for best results. This circuit was inspired by the BEAM sequencer circuits on the web. I simply reversed the roles of the resistors-capacitors and ‘floated’ the capacitors. If you remove the 1nF capacitor then the resulting monstrosity will chirp out RF interference as it hobbles along.
Source: http://www.members.shaw.ca/novotill/PwmLedChaser/index.htm

Be the first to comment - What do you think? Posted by admin - April 27, 2009 at 11:51 am

Categories: LED Flasher, Lighting Tags: led display

Very simple LED Flashing with sound

If we wasp one size miniature serial loudspeaker (8 ohm speaker) suits. Flashing LED number FRL – 4403 which be mourn shine that can can blink. By must not use other equipment help. unless , power supply gives with it only. Already will hear the sound goes out a loudspeaker in the rhythm that it works with.

Be the first to comment - What do you think? Posted by admin - February 6, 2009 at 4:17 am

Categories: LED Flasher, Lighting Tags: flashing blinking, led display, simple led flasher

LED Display for On-Off battery indicator

This circuit uses LED – 2 pcs. show something On – Off of or the circuit that use Battery. By LED – D1 flasher , when open and D2 flasher when open. While open that have charge current amount of flow through D1 go to Charge Capacitors 1000 uF , make D1 stick or shine and switch off when Capacitors the full. Then have current which flow be Leakage Current the a little. When enough close capacitors 1000 uF discharge way D2 , then stick tell close or cut the circuit has already. The detail is other , friends see in the circuit yes.