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Light Flasher
Circuits Page 1 Light Flashers:
#'sA - CD - FG - KLM - RST - Z
Last Updated on:
Monday, October 03, 2011 06:07 PM
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:
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)
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)
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)
