1 5v LED FLASHER

1.5v LED FLASHER

This will flash a LED, using a single 1.5v cell. It will even flash a white LED even though this type of LED needs about 3.2v to 3.6v for operation.


The circuit takes about 2mA but produces a very bright flash.

source : http://www.talkingelectronics.com.au/projects/200TrCcts/200TrCcts.html

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LED Circuit with Timer 555

This circuit LED reproduces the first LED sequence at this time used by FISA on behalf of Formula single racing. It may perhaps be alive used with slot car sets (such for example HO shin up AFX/Life Like/Tyco sets) or else means of communication controlled cars. IC1, a 555 timer IC, is used as a watch pulse generator. Its output is fed via NAND gates IC2a and IC2c to IC3, a 4024 binary counter. IC2b inverts the O4 output of 4024 binary counter IC3. originally, IC3 is reset and all its outputs are low, together with O4, which causes IC2b to present-day a rational climax to the pin 8 input of IC2c which after that passes pulses from the 555 timer circuit to the clock input of the 4024. IC3 then begins together with.

Following the count has reached binary 1111, the subsequently pulse sends the O4 output of IC3 high, which disables IC2c and IC3 stops with. The four used outputs of IC3 are connected to a resistor ‘ladder’ which acts to the same degree a clear-cut digital to analog convert-er (DAC). As the count increases so does the voltage produced by the side of the top of the ladder and this is connected to the inverting inputs of four comparators inside IC4 (an LM339) and to IC5, which is a 741 op amp furthermore connected while a comparator.

The categorical inputs of the comparators are connected to the taps of a voltage dividing wall, with the drumming voltages settle on using VR1, a 100kO trimpot. As IC3 counts, the rising stepped voltage from the DAC ladder switches the comparators on clothed in sequence, preliminary with IC4d and working up to IC5. in the same way as both comparator is curved on, its pair off of LEDs is lit; former LEDs 1 & 2, next LEDs 3 & 4 and so on. as soon as all five pairs of LEDs are lit, the then pulse from IC1 moves the binary count of IC3 to 10000, so the DAC voltage drops back to zilch and all LEDs are extinguished. by the same spell, with too stops, for the reason that the area of high pressure on O4 causes IC2c to check extra gate pulses. The circuit in that case remains reserve until the counter is reset by urgent pushbutton switch S1. This allows a recent sequence to initiate.

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SONY KLV 32S550A KLV 26S550A – HOW TO DISASSEMBLE – LED BLINKING CODES

SONY KLV-32S550A - KLV-26S550A –DISASSEMBLE – LED BLINKING CODES 

KLV-32S550A (RM-GA016) – [GE, ME, Philippines, (Blue)  Russia, South Africa]

KLV-32S550A/T (RM-GA016) [GE, ME, Philippines, (Brown)  Russia, South Africa]

KLV-37S550A (RM-GA016) [GE, India, Iran, ME, Philippines, Russia, Thailand, Tunisia]

LED BLINKING CODES – SELF DIAGNOSIS FUNTION – REMOVAL OF BACK COVER & SCREW SIZES.

Blinking codes: Triangle chart

KLV-26S550A, 32S530A, 32S550A, 32S550A/L, 32S550A/T

KLV-37S550A

R2 Board and Rear Cover Removal. [KLV-26S550A/1, 26S550A/3]

R2 and Rear Cover Removal [KLV-32S550A/1, 32S550A/3]

Removal of Rear Cover Procedure

Removal of Switch Unit

Push and slant towards inner side of set to remove Switch Unit correctly.

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230V LED Indicator circuit

This is very useful schema for you.You can use this schema as a current indicator.The special thing of this schema is this schema operates 110V to 230V.I myself have use this schema for my door bell.so visitors who come home at night can easily see the door bell.you your self think different way and do something newly






Parts

R2 = 1M-1/2W
R1 = 470R-1/2W
D1 = 1N4007
D2 = 1N4007
D3 = 1N4007
D4 = 1N4007
D5 = 5mm. Blue LED
C1 = 220nF-275vAC


Note

# When you deal with 230V be careful.If you are too little Dont try this schema

#Use Quality parts.Specially think about the W of your parts

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LED torch using MAX660

This is a simple LED torch schema based on IC MAX660 from MAXIM semiconductors. The MAX 660 is a CMOS type monolithic type voltage converter IC. The IC can easily drive three extra bright white LEDs.The LEDs are connected in parallel to the output pin 8 of the IC. The schema has good battery life. The switch S1 can be a push to ON switch.



Notes.

* Assemble the schema on a general purpose PCB.
* The IC must be mounted on a holder.
* The schema can be powered from two torch cells connected in series.
* The capacitors C1 and C2 must be Tantalum type.
* The diodes D1 to D3 must be of 1N4148.

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120V AC Line Powered LED

The following schema diagram shows you about how to powering a LED (or two) from the 120 volt AC line applying | working with a capacitor to drop the voltage together with a little resistor to limit the inrush electric current. Considering that the capacitor need to pass current in both directions, a modest diode is connected in parallel using the LED to supply a path for the negative half cycle and also to limit the reverse voltage across the LED. A second LED using the polarity reversed could be subsituted for the diode, or perhaps a tri-color LED might be put to use which would appear orange with alternating current. The schema is fairly efficient and draws only about a half watt from the line. The resistor value (1K / half watt) was chosen to limit the worst case inrush electric current to about 150 mA which will drop to much less than 30 mA in a millisecond as the capacitor charges. This appears to be a secure value, Ive switched the schema on and off several times without having harm to the LED. The 0.47 uF capacitor has a reactance of 5600 ohms at 60 cycles so the LED current is about 20 mA half wave, or 10 mA average. A bigger capacitor will boost the electric current along with a smaller 1 will lessen it. The capacitor should be a non-polarized kind having a voltage rating of 200 volts or a lot more.

The lower schema is an demonstration of obtaining a low regulated voltage from the AC line. The zener diode serves as a regulator and also supplies a path for the negative half cycle electric current when it conducts inside the forward direction. In this example the output voltage is about 5 volts and will give over 30 milliamps with about 300 millivolts of ripple. Use caution when operating any electronic diagram hooked up straight to the AC line.

120V AC Line Powered LED schema source:
http://www.bowdenshobbydiagram.info/page10.htm#lineled.gif

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Magic Lights Circuit using Bi Colour LED

This is the magic lights schema which use bi-colour LED as the output to provide the light. The schema uses 14 bi-colour (red and green) LEDs having 3 terminals each. Various dancing colour patterns are generated utilizing this schema considering that each LED can create three various colours. The middle terminal (pin 2) of the LEDs will be the common cathode pin that is grounded. When a positive voltage is applied to pin one, it emits red light. Similarly, when positive voltage is applied to pin 3. it emits green light. And when positive voltage is simultaneously applied to its pins 1 and 3, it emits amber light.

The schema could be implemented for decorative lights. The IC1 (timer IC 555) is applied in astable mode of multivibrator to produce clock signal for IC2 and IC3 (CD4518) that are dual BCD counters.

The two counters of each one of these ICs have already been cascaded to acquire 8 outputs from each. The outputs from IC2 and IC3 are connected to IC4 through IC7 that are BCD to 7-segment latch/decoder/driver ICs. Therefore we acquire a complete of 14 segment outputs from each of the IC pairs composed of IC4 plus IC5 and IC6 plus IC7. While outputs from former pair are connected to pin No. 1 of all the 14 bi-colour LEDs through current limiting resistors, the ouputs of the latter pair are similarly connected to pin No.3 of all the bi-colour LEDs to acquire a magical dancing lights effect.

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LED light flasher

This is a very basic schema for flashing one or more LEDS and also to alternately flash one or more LEDs.

It uses a 555 timer setup as an astable multivibrator with a variable frequency.
With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second.

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