Showing posts with label lights. Show all posts
Showing posts with label lights. Show all posts
Thursday, October 23, 2014
Emergency Lights Circuit
The series of emergency lights on this one is a series of emergency lighting is quite simple and not difficult to make.
Frankly this circuit is not my own design, but at least this series can add to your collection of electronic circuits. The circuit is actually almost the same as the battery charger circuit, its just that in this emergency coupled switching circuit as a circuit breaker when the circuit load is connected to the supply voltage of 220 volts or in other words on the charging position. Meanwhile, when the voltage of 220 volts is lost (PLN lights off), then automatically switches the load switching circuit and turn on emergency lights, where the supply that is used is derived from batteries that have been installed in stand-by position.
In a series of emergencies over the use of LED as a lighting load emergency. And indeed these days we find a lot of emergency lights that are sold in the market that use LEDs, but the LED is used instead led carelessly but has led a gleam of light. The advantages of the use of this led the led is very efficient because once will consume battery power so that with a limited supply to run the series in a long time.
Circuit components used for emergency lighting is not too much, and indeed the components used are the components that are commonly used as components for circuit switching power supply and battery charging. IC LM 317 ic regulator is useful as a producer of supply voltage to supply the batteries. Transistor T2 (BD 140) is useful as switching, ie, decide the flow toward the load at 220 volts PLN lamp life so that lighting will be extinguished. But when the lights PLN did not provide the supply voltage of the transistor T2 will connect the connection from the battery to the load light.
Components used:
Resistors: R1 (180 uhm), R2 (1.2 K), sd R3 R14 (100 ohms), R15 (1 K) and R16 (16 ohm, 5 watt)
Capacitors: C1 (1000 UF)
Diodes: D1 until D5 (IN 4007)
Transistors: T1 (BC 548) and T2 (BD 140)
Zener Diodes 6.8 Volt
IC: LM 317
Battery charger
Transformer
If you are not happy using this type of charger with IC LM317 series like the example above then you can use another type of charger circuit that you think is more appropriate and can work optimally. Then you simply add the switching function by using one or more transistors.
Thursday, October 16, 2014
Simple Knight Rider lights Circuit for model cars
This simple circuit drives 6 LEDs in Knight Rider scanner mode. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version).
Simple Knight Rider lights Circuit
![Simple]()
Note
That VDD and GND for the ICs are not shown in the circuit drawing.
Simple Knight Rider lights Circuit
Note
That VDD and GND for the ICs are not shown in the circuit drawing.
| Pin-outs: | |||||
| (7)555 | 4017 | ||||
| 1 | GND | 1 | Q5 | 9 | Q8 |
| 2 | TRIGGER | 2 | Q1 | 10 | Q4 |
| 3 | OUTPUT | 3 | Q0 | 11 | Q9 |
| 4 | RESET | 4 | Q2 | 12 | CO |
| 5 | CONTROL VOLTAGE | 5 | Q6 | 13 | NOT ENABLE |
| 6 | THRESHOLD | 6 | Q7 | 14 | CLK |
| 7 | DISCHARGE | 7 | Q3 | 15 | RESET |
| 8 | VDD | 8 | GND | 16 | VDD |
Monday, September 8, 2014
RGB Lights Wiring diagram Schematic
The overall effect produced by this project is a glowing sequence of lights changing slowly from one colour to the next. The microcontroller cycles through randomly generated values of red, green and blue hues of light to produce a variety of nice colours.
The software implemented on the controller interpolates from one shade to another, each colour channel being treated independently. Light intensity is controlled by means of pulse width modulation (PWM) for each colour. A high frequency of approximately 60 Hz is used to modify the light intensity and eliminate any flicker that might arise.
RGB Lights Circuit Diagram
The software implemented on the controller interpolates from one shade to another, each colour channel being treated independently. Light intensity is controlled by means of pulse width modulation (PWM) for each colour. A high frequency of approximately 60 Hz is used to modify the light intensity and eliminate any flicker that might arise.
RGB Lights Circuit Diagram
One major problem that had to be over-come was unequal brightness of the LEDs used, the result of which is a tendency for one particular colour to dominate in the overall hue produced. It was found that blue LEDs are perceived to have the largest intensity and green, the lowest. This was compensated for by using a large resistor for blue and a low resistor for green, together with two green diodes in series for higher green colour intensity. The values of the resistors may have to be tweaked to achieve the best balanced colour intensity. A diffused glow was achieved by cutting the lens of the ultra bright LEDs used and using a ping pong ball as a basic diffuser.
This very simple project is perfect for a rainy day and can be built in a couple of hours. Despite its simplicity it will produce a very interesting and glowing effect. Several units may be built and they will mix a variety of colours randomly.
The source and hex code files for the PIC12F675 device are available as free download # 080419-11. zip from the Elektor website. The code was developed using CCS C.
Author: Joseph A. Zamnit - Copyright : Elektor
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