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Light Flasher Circuits   Page 1
Light Flashers:  #'s        A - C        D - F        G - K       L       M - R      S     T - Z
Last Updated on:
Thursday, November 30, 2017 07:41 AM


Circuits Designed by Dave Johnson, P.E. :
  • 1.5V LED FLASHER VERSION A
    Many published circuits that flash LEDs need 3 volts or more. This circuit uses only a single inexpensive C-MOS IC and flashes the LED for a full year on a single 1.5 volt AA alkaline battery cell. The circuit uses a charge pump technique to provide the LED the needed voltage.
  • 1.5V LED FLASHER VERSION B
    To squeeze even more energy from a alkaline battery cell, this circuit adds two transistors to a circuit similar to the above design to boost the efficiency. A small 1.5 volt alkaline N cell should flash the LED for a full year. It too uses a "charge pump" technique to provide a LED the needed voltage.
  • 9v POWERED XENON PHOTOFLASH Controller
    This 9v battery powered circuit is designed for remote control flash needs.  A charge control circuit turns off the high voltage generator when the photoflash capacitor is fully charged.  A neon lamp is included to indicate when the system is ready to flash.


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1.5 Volt LED Flashers #1:  four circuits with description (added 4/02)

10 Channel LED Sequencer:  based on4017 (added 4/02)

10 LED Sequencer:  in PDF format, text in Finnish (added 4/02)

10 Stage Light Sequencer:  flashes10 low voltage bulbs, operates at10-25-Volt voltage, in PDF format, text in Finnish (added 4/02)

12 Stage Neon Sequencer (NE 2/NE 51):  uses small power 70-Volt neon bulbs (added 4/02)

12 Volt Strobe Circuit:  this circuit uses12V DC instead od mains AC. This is very good idea if you don't want to mess with direct mains voltage connected circuit or you want to run  Strobe from batteries. (added 4/02)

120 VAC Lamp Chaser using Solid State Relays:  (circuit / schematic design added 6/06)

120 Volt AC Lamp Chaser using Solid State Relays:  This circuit is similar to  LED clock using12 neon indicator lamps instead of LEDs. It operates from2 high capacity ni-cad cells (2.5 volts) which keep it going for a couple weeks. High voltage (70 volts) for  neon lamps is obtained from a small switching power supply using a 74HC14 Schmitt trigger Squarewave oscillator, high voltage switching transistor, and10 mH high Q inductor. Most any small PNP transistors can be used that have a C/E voltage rating of 80 or more. (added 4/02)

16 Stage BiDirectional LED Sequencer:  (circuit added 7/02)

18 Stage LED Sequencer:  (circuit / schematic design added 6/06)

2 Transistor 2 LED Flasher:  (circuit / schematic design added 6/06)

2 Transistor LED Flasher #1:  (circuit added 7/02)

2 Transistor LED Flasher #2:  (electronic design added 9/02)

2 Wire Lamp Flasher:  Ideal to operate3 to24 Volt DC existing on-Circuit lamps LED operation is also possible (added 9/04)

220 Volts Flashing Lamps:  Especially designed for Christmas tree lamps to replace old rmally-activated switches (added 9/04))

250ksps 16-Bit Micropower ADC Offers an Excellent Combination of Size Power and Speed:  DN294  Design Notes (Linear Technology) (app note added 6/06)

2-wire Lamp Flasher:  This circuit has been designed to provide that continuous light lamps already wired into a circuit, become flashing. Simply insert  circuit between existing lamp and negative supply. Especially suited for car or panel pilot lights, this device can drive lamps up to 10W....  (design added 11/06)

3rd Brake Light Pulser:  (electronic diagram added 6/03)

40 LED Bicycle Light (555 Timer 6 Volt):  (circuit added 7/02)

8 Random Flashing LEDs:  This project flashes eight LEDs in an apparently random manner. It uses a 4060 combined counter and display driver IC which is designed for driving 7-segment LED displays. The sequence is not really random because seven of  LEDs would normally be  display segments,  eighth LED is driven by an output that is normally used for driving furr counters. The table below shows  sequence for  LEDs. You can use less than eight LEDs if you wish and  table may help you decide which ones to use for your purpose. (added 09/05)


 
Light Flashers:  #'s        A - C        D - F        G - K       L       M - R      S     T - Z


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