LED Off Delay Circuit with dimming effect

Link to page: http://pcbheaven.com/circuitpages/LED_Off_Delay

This is an extremely simple and tiny LED off delay circuit with dimming effect. A pushbutton turns on a number of LEDs, which are kept on as long as the button is pressed. When the button is released, an off-delay will keep the LEDs turned on for an amount of time. Then, the LEDs will start dimming slowly, until they are completely turned off. I have include 4 different schematic diagrams for 4 different power supplies (5, 9, 12 and 15 volts). A single circuit can control up to 104 LEDs @ 15Volts.

Category:

Science & Technology

Tags:

• electronic
• circuit
• pcb
• schematic
• diy
• project
• LED
• off
• delay
• dimmer
• led
• dimming
• dim
• light
• control
• controller
• car
• dome
• security

[directcurrent10]

WHAT TYPE OF LEDS DID YOU USE FOR THIS..COZ I FOLLOW YOUR GIVEN LINK TO SEE THE SCHEMATIC OF IT BUT NO TYPE OF LED'S SHOWN..?

[pcbheaven]

@directcurrent10 normal 3.2V 20mA LEDs in series.

[itolond]

i am seeking a way to dime an led (adjustable) this is for modeling, install the led and adjust until the led is 'just right' these will be smd and small leds

i am not electronics savvy any pointers would be great

[pcbheaven]

@itolond visit my site and go to the "circuits" sections. You will find some simple LED dimmers there.

[STEFANISJOHN]

Στα Ελληνικά πατριότη ..... ντρέπεσαι ;

[pcbheaven]

@STEFANISJOHN oxi patrioth, den einai thema ntrophs alla thema epiloghs.

[directcurrent10]

PARTS LIST??

[thorpjoern]

@pcbheaven Thank you very much for your help. Now I've made the 555 monostable circuit and it's working just like it should.

[pcbheaven]

@thorpjoern you need to make another circuit, which is not difficult. go to my page (pcbheaven[dot]com) and then go into the "theory" section. Find the "basic monostable circuit" and make it. You may also want to read some theory of the 555. go again to the theory section and read the "555 theory".

[thorpjoern]

@pcbheaven Do you mean that I have to make an other circuit with a 555 timer, or can I somehow add a 555 timer to this circuit? (Sorry I'm a beginner at this stuff)