Light Laser LED Circuits

That Section include a load of circuits and projects that use LEDs/lasers/Bulbs. Find from laser diodes drivers, light sensing circuits, led circuits, Xenon lights, and more. 100s of LED/laser/Light circuits for every hobbyist, technician, student, and design professional. An nice reference tool which includes lots of LED/laser/Light circuits. look at these circuit ideas, some of them may need some modification if they are to work as advertised. Ideas along with pretty good descriptions for each circuit.

Infrared	Light Sensing	Fluorescent Circuits
Xenon	Laser	LCD circuits
Lighting	Led circuits	Light Dimmers

Phase-Controlled Dimmer Circuit

A phase-controlled dimmer delays the triac turn-on to a selected point in each successive ac half cycle. Use this circuit only for incandescent lamps, heaters, soldering irons,..

Logarithmic light-meter circuit

The meter reading is directlyjproportiona! to the logarithm of the input light power. The logarithmic circuit behavior arises from the nonlineardiode pnjunction current/voltage relationship..

Three-year-led-flasher

Inserting two 1-MO resistors, R1 and R2, in the output stage of one of the circuit"s inverters limits the current needed by the oscillator tone more than a few pA. This circuit includes a CD4007 package, which has three CMOS inverters. It forms a standard three-inverter oscillator. Resistors R1 and R2, in series with separate drains on inverter pins 8 and 13, limit the oscillator"s supply current. Capacitor C1 and resistors R5 set the off time of the oscillator, C1; R6.....

Low voltage flasher

Applying voltage to the circuit triggers SCR1. With SCRl on, the voltage on the anode of SCR2 rises until SCR2 triggers to commu-tate SCRl. The voltage on the gate of SCRl will swing negative at this time, and only after a positive potential of 0 volt is once again attained, will SCRl retrigger..

Infrared-wireless-speaker-system

Although theIR region is free from radio interference, it is subject to interference from incandescent lamps, fluorescent lamps, stray reflections, and other sources. A simple way to overcome that problem is to create a carrier by chopping the IR radiation at a rate of 100 kHz. The audio then modulates the carrier by modulating the chopping rate. A receiver then detects the IR beam as a 100-kHz FM signal. ..

Multi-color LED driver

Have you ever wondered how many different colors can illuminate a LED? One, two or maybe three? Constructing this simple circuit, you will find it much more. The key component in this design is a dual LED. One such accessory includes two inside the 'slices' of different diode LED, that each of them produces a different color (usually green and red). For the drive requires three pins, a common cathode and two separate roots. In this way each of the two integrated diodes can.....

Half wave AC phase-controlled circuit

The 5AH will trigger when the voltage across the two 0 juF capacitors reaches the breakdown voltage of the lamp. Control can be obtained full off to 95% of the half wave RMS output voltage..

Ir Heat-Controlled Kitchen Fan

Ql senses IR from heat sources, causes U1 to switch, activates optocopuler Ul, and triggers TR1. This contro..

Alternating flasher

The flash rate is determined by CI and R4. ..

Light dimmers

The two lamp-dimmer circuits differ in that (a) employs a single-time-constant trigger network and (b) uses a double-time-constant trigger circuit that reduces hysteresis effects and thereby extends the effective range of the light-control potentiometer. (Hysteresisre-fers to a difference in the control potentiometer setting at which the lamp turns on and the setting at which the light is extinguished) The additional capacitor C2 in (b) reduces hysteresis by charging to a.....

Transistor-flasher

This astable multivibrator uses incandescent lamps in place of collector load resistors. ..

Laser Power Supply

ICl is a 555 timer running at about 16 kHz. This IC drives Ql, a TIP146, which produces a 12-V square wave across Tl pri..

Shift register

The shift pulse amplitude is less than 15 volts. If a stage is off, the shift pulse will not be coupled to the next stage. If it is on, the diode will conduct and trigger the next stage. Just prior to the shift pulse the anode supply is interrupted to tum off all stages..

Auto light controller

A 555 timer IC, operating in the one-shot mode, is triggered by light striking photoresistors. These normally have a resistance of several megohms but, in the presence of light, that resistance drops to several hundred ohms, permitting current from the six-volt source to flow in the circuit. The R-C combination shown gives an on-time of about two minutes. Photoresistors PC3 and PC4 are mounted at heatlight-height. When headlights illuminate the photoresistor, the timer.....

Bias Supply For Microwave Preamps

These two circuits provide bias for the microwave preamps shown in this text. The circuit in Fig. 51-5(a)..

120Ac Shimmering Light Circuit

You can turn any ordinary household bulb into one that shimmers or blinks. This circuit works on any incandescent light up to 200 W, arid runs on standard 120 Vac. The circuit uses an SCR to cause an ordinary lamp to sliimmer. Note that one side of the lamp is connected directly to 120 Vac, and the other side of the lamp goes to the cathode of the SCR. As ac voltage is brought into the circuit through the line cord, it is full-wave rectified by diodes D1 and 1)2. That.....

Long-range-object-detector

When long ranges must be worked with IR light sources, and when high system reliability is required, pulsed-mode operation of the IRis required. Additional reliability of operation is attained by synchronously detecting the photodetector current, as this circuit does. PC-1 is an IR and phototransistor pair which detect the presence of an object blocking the transmission of light from the IR to the phototransistor. Relatively long-distance transmission is obtained by.....

Fantastic Simulated Laser Circuit

The circuit uses a 555 timer IC to power an ultrabright LED. The output is a pulsing red light that can be projected using lenses. An ultrabright Stanley LED, capable of 300-millicandle output, is tied to pin 3 of the 555 timer IC. That IC has been configured as an astable multivibrator. The frequency of this multivibrator is controlled by Rl, R2, CI, and PI. You can vary the frequency by adjusting PI, which changes the output from a slow blinking to a fast pulsating light...

Simple strobe circuit

Initially the neon and xenon lamps are not conducting and act like a very high (almost infinite) resistance. Capacitors Cl and C4 in conjunction with DI and D2 form a voltage doubler circuit, which can charge C2 up to about 300 Vdc after several ac cycles. Voltage increases as current is supplied through Rl and R2. Neon bulb II will all of a sudden start to conduct when the voltage across C3 reaches II's ionization potential. While conducting, the resistance of the bulb.....

Variable-strobe-light

In this strobe-light, two circuits are needed; one circuit charges a capacitor placing 320 V de between the cathode and anode of the flashtube. The other circuit provides bursts of approximately 4000 V to trigger the flashtube into conduction. The voltage-doubler works by summing two equal voltages in series, which results in a doubling of the voltage. The 4000 V needed to trigger the flashtube is provided by transformer Tl-a voltage step-up transformer that develops.....

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'Floating' AMC7135 Driver for More Volts? - Laser Pointers

I am wondering, has anyone here ever tried to use a voltage divider to float one of these drivers so the circuit load (laser or LED) can run on a higher voltage than the regulator? See image below:...

Help a newbie with a problem - Laser Pointers

I have a schematic that I did of the driver board and although I think that it is accurate, I am unsure about the symbology of the laser diode itself. Here is the schematic: It appears to me that t...

Stacking up amperage with LED indicators - Laser Pointers

before I push the main power button. I was wondering if I drive the first LED to its needed amperage that the LED's amperage will stack up along with the amperage from the laser diode driver. Also,...

Lasers/LED's in series/parallel circuit - Laser Pointers

Is it possible to hook up a few lasers lasers with a few LED's in a series parallel circuit? The LED calculator online doesn't seem to have a function.

2-Layer Circuit Boards Using Laser Cutter / Chemical Etching

I've kind of been obsessed with trying to make circuit boards on my laser cutter since I got it. Other people had already ... The booster can even power small external devices requiring a higher vo...

Green Laser Led: This amazing characteristic of the laser of laser ...

Diode laser ranging receiver circuit and timing of pulsed diode laser ranging receiver circuit and timing of semiconductor Pulse, Semiconductor Laser rangefinder Receiver (UHF) Circuit and Timing M...

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