Circuit panel: led

Showing posts with label led. Show all posts

Thursday, January 9, 2014

230V LED Circuit Diagram

I think this circuit is very important circuit .because you can fix this circuit with a 230V switch or plug at that time you can see whether power is available or not.Not only that we can fix this circuit with door bells.In my home also I have attached this circuit with my door bell.

Note

If you are a student please dont try to make this because 230V is dangerous

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Tuesday, April 30, 2013

AC 230V Led Circuit Diagram by DIAC

Tthis is a very simple LED flasher circuit diagram that is powered from AC 230V mains. This Flasher can be used as a power indicator for the AC 230V mains supply. This circuit is made with few numbers of parts namely, a LED, two Resistors, one Capacitor, one Diode and one DIAC. The DIAC act the main role to flashing the LED. DIAC is a bidirectional device. It conducts current only after its breakover voltage has been reached its threshold. Most DIACs breakover voltage is around 30 V.

230V Mains Power Indicator LED Flasher Circuit Diagram

When mains is connect to the circuit, the Capacitor(C1) starts charging through Diode(D1)&Registor(R1). When the voltage on the capacitor reached the DIAC’s threshold voltage, the DIAC get turn on. And LED gets Lights(flash). At the same time Capacitor(C1) goes discharges and breakover voltage of DIAC also decrease and LED turns OFF. The on off time of the LED depends on the value of Capacitor(C1) and Resistor(R1).

Note that the flashing time of the LED shown in the animating figure is not the exact timing of ON/OFF.

Copyright : CircuitsTune.com

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Saturday, April 13, 2013

Outdoor LED Solar Lights Circuit Schematic

This Outdoor LED Solar Garden Lights venture is a passion circuit of an computerized garden mild the use of a LDR and 6V/5W solar panel. During day time, the internal rechargeable 6 Volt SLA battery receives charging current from the linked sun panel thru polarity safety diode D9 and current restricting resistor R10. If ambient light is commonplace, transistor T1 is reverse biased through IC1 (LM555). Here IC1 is wired as a medium current inverting line forcer, changeed by using an encapsulated light detector (10mm LDR). Multi-turn trimpot P1 sets the detection sensitivity. When ambient gentle dims, transistor T1 turns on to force the white LED string (D1-D8). Now this lamp load on the output of T1 energizes. Resistors R1-R8 limits the running current of the LEDs. When the ambient mild level restores, circuit returns to its idle state and light(s) changeed off by way of the circuit.

Circuit diagram:

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Outdoor Garden Solar Lights Circuit Diagram

Assemble the Outdoor Solar Lights circuit on a basic function PCB and enclose the entire meeting in a transparent plastic box. Drill appropriate gaps on the highest of the enclosure to mount the mini sun panel (SP1) and the solarshine sensor (LDR), and in front for fitting power switch (S1) and the sensitivity controller (P1). Fix the battery within the cabinet the use of a double-sided glue tape/pad. Finally, the LDR will have to no longer be mounted to receive direct sunlight. It must be established on the prime of the enclosure, pointing to the sky say southwards. This circuit could be very simple. So and skilled pastimeists can alter/modify the entire circuit as per their very own ideas with none problem (Just are trying a 6V relay with T1 to force extra number of LED strings).

http://www.ecircuitslab.com/2011/10/outdoor-led-solar-lights-circuit.html

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Wednesday, April 10, 2013

Efficient Automatic White LED Emergency Light Circuit

Description:

Referring the figure, we see that the circuit is actually very easy to understand, let’s evaluate it with the following points:

The transformer, bridge and the capacitor forms a standard Power supply for the circuit. The circuit is basically made up of a single PNP transistor, which is used as a switch here.

We know that PNP devices are referenced to positive potentials and it acts like ground to them. So connecting a positive supply to the base of a PNP device would mean grounding of its base. Here, as long as mains power is ON, the positive from the supply reaches the base of the transistor, keeping it switched off. Therefore the voltage from the battery is not able to reach the LED bank, keeping it switched off.

In the meantime the battery is charged by the power supply voltage and it’s charged through the system of trickle charging.

However, as soon as the mains power disrupts, the positive at the base of the transistor disappears and it gets forward biased through the 10K resistor.

The transistor switches ON, instantly illuminating the LEDs.

Initially all the diodes are included in the voltage path, and are gradually bypassed one by one as the LED gets dimmer.

Parts List

R1 = 10K,

C1 = 100uF/25V,

D1, D2 = 1N4007,

D3---D6 = 1N5408,
T1 = BD140

Tr1 = 0-9V, 500mA,

LEDs = white, hi-efficiency, 5mm,

S1 = switch with three changeover contacts.

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Monday, April 8, 2013

LED Flasher Circuit Using 555 Timer IC

This is a simple LED flasher project that uses a common 555 timer IC for its operation. It is configured as an astable mode which means that its output is a square wave oscillator. Two LEDs are connected to its output in such a way that when one LED is ON, the other LED will turn OFF.

It uses only 10 simple parts that are easily available at any electronic shops. Capacitor C2 charges exponentially through resistors R1, R2 and the resistance of the trimpot. When C2 has charged to about 2/3 VCC it stops charging and it discharges to about 1/3 VCC through R2 and the trimpot resistance via pin 7. This is the standard operation of a 555 timer. When a Vcc of 5 V to 15 V DC is applied to the circuit, the LED will start to flash.

The frequency of the flashing can be changed by varying the resistance of the potentiometer or trimpot.Parts List The parts list of the simple LED project is as shown below.

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