How to make led Project. 12v led project 2017
1.four colours leds. red led , blue led, yellow led, green led using project.
1.12V 2A power suppay
Whenever the LED is on, the voltage it uses it up is somewhere between 1.85V and 2.5V. We’ll say 2.2V for average – that’s a good assumption for most red, yellow, orange and light-green LEDs. If we subtract that from 9V we get about 6.8V left. This is the voltage that must be ‘absorbed’ by the resistor.
In electronics, an LED circuit is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.
Often use IC-4017 CMOS-IC. This really neat chip contains a counter and a decoder circuit, that can show a single output pin for each count from 0 to 9.
And also use to build all kinds of timer, LED sequencers and controllers circuits.
1.) Pin 16 is positive power supply and pin 8 is a ground.
The power supply range of 3 volts to 16 volts and Maximum power supply voltage at pin 1 must not much than 18 volts.
2.) Pin 13 is Clock enabled pins to controls the clock.
When it is “0” logic, the clock is enabled and the counter advances one count for each clock pulse.
When “1” logic, the clock input is stop, and the counter does nothing even when clock pulse arrive.
3.) Pin 14 is the clock triggers one count.
The clock pulse must be “clean”.
If they are “noisy” the counter may advance two or more times during each clock pulse.
4.) Pin 15 is the reset pin. Normally, it is “0”.
When made “1”, the counter is reset to “0”.
5.) Pins 1-7 and 9-11 are the decoded output pins.
The active count pin goes high and all others remain low.
6.) Pin 12 is Carry output, for the clock input of an additional counter or an external circuit that the count is complete.
Xem thêm bài viết khác: https://smartworld.vn/meo-vat/