Ten-LED Chaser -  I don't know why, but people like blinking lights. You see LED chasers everywhere, in TV shows (Knight Rider) , movies, and store windows. This schematic is my version of a simple 10 LED chaser. There is no 555 timer used because. . .  [Circuit designed by Aaron Cake]

Ten-LED Sequencer -  Schematic only, text in Finnish. . .  [Designer's name not given]

Ten-LED Sequential Flasher using Low Powr -  A while back I posted a flasher circuit which flashed 10 LEDs sequentially. That circuit was powered by four AA alkaline cells. The circuit below operates much the same way but has been modified to run from a single 3v CR2032 lithium coin cell . . . [Circuit by David A. Johnson P.E.,  04/17/11]

The LED Flashing Sweetheart Kit -  When was the last time you gave a gift you made yourself? Elementary school? Get off the consumerist fast track and quit copping out with inferior gifts like candy and flowers. The LED Flashing Sweetheart Kit contains a circuit board, 28 LEDs. . . 

Third Brake Light Pulser -  Several years ago these flashers were introduced in the automotive industry as part of the third brake light and contained strobe lights (and strobing continuously for the duration of pressing the break pedal) but got abandoned almost immediately sometime later because of the 'strobe' effect it has on some people. . .  [Tony van Roon's circuit]

Three Channel Color Organ for a Car -  An Active Filter Design. . . .  [G.L. Chemelec, designer]

Three Volt Universal LED Flasher -  The circuit below will flash any LED color with fixed current pulses powered by a 3v battery. It uses a charge pump approach, which routes a constant current pulse through the LED, regardless of the LED voltage requirement. Using this approach, white and . . . [Hobby Circuit designed by David Johnson P.E.,  06/22/08]

Three-Component Flasher -  Since this flasher system uses only three components, it is relatively easy to build and install. It can be used for signal flashing, hazard warning and alternate flashing. . . .  [© EFY Enterprises Pvt. Ltd. All rights reserved]

Three-Volt Low Battery Voltage Flasher -  Many battery powered devices use two AA alkaline cells. Often you will not know when it is time to replace the batteries until the device powered by them actually stops operating. The hobby circuit below can be connected to a 3v battery, to give you some . . . [Hobby Circuit designed by David Johnson P.E.,  01/01/98]

Three-Volt Powered Super Bright LED Flasher -  I have posted several kinds of LED flashers over the years.  This is yet one more flasher, designed to flash any high power LED of any color. It hits the LED with a 25ms 250ma pulse once every 2 seconds.  This works out to an average current about 3ma. It . . . [Hobby Circuit designed by David Johnson P.E.,  04/22/09]

Touch Activated Switch -  This circuit provides about one watt of non-isolated DC power for an automotive type 12v LED array lamp in addition to a standard incandescent table lamp.  . . . [Circuit by David A. Johnson P.E.,  01/18/02]

Traffic Light -  A two-way traffic light using a CMOS 4017 and 555. To be used as toy only. . .  [Jose Pino]

Traffic Light -  This project operates red, amber and green LEDs in the correct sequence for a single UK traffic light. The time taken for the complete red, red & amber, green, amber sequence can be varied from about 7s to about 2½ minutes. A 4017 counter is used to produce the traffic light sequence and this project could be adapted. . .  [John Hewes]

Traffic Light 2 -  A two-way traffic light using a CMOS 4017 and 555. To be used as toy only. . .  [designed by Jose Pino]

Traffic Light Control Circuit 74145 -  Scroll down to find this circuit. This page features a circuit that has twenty open collector outputs that turn on one at a time in a continuous sequential manner. The circuit make use of the 74LSxx family of TTL integrated logic devices. The circuits. . .  [from Rob Paisley's Model Train web site]

Traffic Light Controller -  Controls on3 LED traffic light sequence. . .  [PDF - designer's name not included]

Transistor Flasher  -  The basic two-transistor flasher shown below has found its way into dozens of applications due to its simplicity and versatility. Applications have included such diverse circuits as a micropower low battery indicator, a lightning detector, . . . .  [Charles Wenzel (unless otherwise noted)]

Transistor LED flasher -  This circuit has a lot going for it. For one thing, it only consists of two transistors, two capacitors and four resistors. That also means it consumes very little power. You can control the flash rate by changing the size of the 100k resistors (100k makes for a pretty slow rate). You can also control the duty cycle by using resistors of different values on the two sides. . . 

Transistor LED Flasher -  A simple LED flasher that uses only two transistors, one capacitor and one resistor. This basic oscillator can have other simple applications. . . .  [Jose Pino designer]

Transistor Organ -  This simple circuit can provide hours of enjoyment as you learn tunes, play duets or just make some really weird sounds by pushing all the buttons at once. You have probably seen this circuit before, it is fairly common. I have seen it in several. . .  [Circuit designed by Aaron Cake]

Transmitter for Line Powered Xenon Flash -  This line powered xenon flash circuit drives a small camera type flash tube. It has an optical isolator to allow the flash to be safely triggered from some remote device. A flash rate of 2Hz is possible with the circuit . . . [Hobby Circuit designed by David A. Johnson P.E.,  06/09/00]

Tricolor LEDs Create A Flashing Array -  06/24/10  EDN Design Idea   You can build a matrix of RGB (red/green/blue) LEDs using a simple and inexpensive circuit comprising the control logic and driver circuit in Figure 1 and some LEDs (Figure 2). The center RGB LED is the first to come on, after which . . .  [by Jeff Tregre, www.BuildingUltimateModels.com, Dallas, TX]

Triple Stroboscope -  . . .  [by IQ Technologies Industry, unless otherwise noted online]

Two Transistor Flasher -  The basic two-transistor flasher shown below has found its way into dozens of applications due to its simplicity and versatility. Applications have included such diverse circuits as a micropower low battery indicator, a lightning detector, a off-line. . . .  [Charles Wenzel (unless otherwise noted)]

Two Transistor LED Flasher -  This circuit will flash a bright red LED (500 mcd as an attention getting device or fake car alarm. Componten Values are not criticl and transistors may be used. Flash duration is determined by R2. . . .  [Bill Bowden's circuit

Two Transistor LED Flasher -  This is a classic 2 transistor astable multivibrator. Many other NPN small signal or switching transistors can be used, including 2N4401, PN2222 or 2N2222 using the circuit on the left. The circuit can also be inverted using PNP transistors such as 2N3906, 2N4403, PN2907, or 2N2907 as shown to the right. . .  [from Bill's Electronics Reference Library]

Two-wire Lamp Flasher -  This circuit has been designed to provide that continuous light lamps already wired into a circuit, become flashing. Simply insert the circuit between existing lamp and negative supply. Especially suited for car or panel pilot lights, this device can drive lamps up to 10W. . .  [Flavio Dellepiane's web site]

Typical Strobe Light Trigger Circuit -  555 based Timing circuit which triggers a SCR which controls the trigger transformer. . .  [Written by Don Klipstein]

      <<<<Previous   PAGE   Next>>>>