LED Breathing circuit (PWM) for highpower LED, LED strip etc

LED breathing is one of the eye candy for every vehicles, LED fad in and fade out effect looks awesome with under body lighting.

We are using PIC microcontroller here, PIC12F683 is a small 8 pin circuit and having 1CCP module (PWM) in it, it wont cost too much, may be within Rs.60 (1$).we are using 1 pin for PWM output, 1 pin for button pressed feedback and another for button to vary breathing speed (delay between changing duty cycle of PWM), other 3 pins are left spare, you can use it for any other functions like blinkin.


Don't forget to get clean 5V DC power supply circuit before this

Circuit

*The components used in this circuit diagram of same package of original components,  

 Components

IC1:PIC12F683

R1: 1K Ohm

R2: 4.7K Ohm

R3: 100 Ohm

R4: 10K Ohm

R5: 470 Ohm

T1: BC547

Q1: TIP127

Push button, LED.

PCB, Project files & .HEX files

• Project files : Yandex Folder

Any problems?? Comment below

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Programmed LED strip strobe circuit (Multi type with 2 channels)

Mainly designed for police like light switching. This circuit works best with LED strips, High power LEDes, and also Applicable for Indicators.
Well Programmed, 3 Switchable patterns, 1 pattern includes 3 set of blink types
This circuit is made by PIC microcontroller, here I pre-programmed for 3 sets of 3 type functions, You can edit that program…
The given PCB is designed with SMD packages,The project also including schematic with normal components make PCB yourself.

This circuit is formally “MMD Blinker”, made by / made for “Mozambi Moto Digital”

Schematic:

Components:

• IC1: PIC12F675 (wrong in schematic, same package and pin-out)
• IC2:LM7805 (wrong in schematic, same package and pin-out)
• Resistors: 10K, 1K, 4.7K, 100 Ohm.
• Capacitors: 0.1uF (tantalum recommended) .
• Diodes:
• D2:1N4007
• D1: 5V1 Zener diode.
• Q3,Q4: BC547
• Q1,2: PNP high power any.

PCB layouts, Project files(Eagle & MikroC) and .HEX code

• MikroC file: Download 
• Eagle File: Download 
• Programeed .HEX file: Download
• SMD-PCB
  

If any problems. comment below

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Modified 2 stage blinker circuit for LEDes and brakelight

This circuit is like an advanced version of first blinker circuit, it uses 2 astable circuits, not 2 IC. We can use 556 here. 2 Astable multivariator of Low and High frequencies are cascaded and gives good programmed pulse like 1 long pulse and 2 to 5 sort pulse (Depends upon setting).

The below circuit shows Multi-function blinker circuit

Components:

IC: U1A,U1B : LM556 (Duel timer IC)
Resistors: R1: 1.2K, R2:1K*, R3 750 Ohm, R5:220 Ohm
Pot: R4:1K Ohm, (R2:2K*)
Diode: D1,D2,D3: 1N4007.
Transistor: Q1: MJE200 or any power NPN transistor.
Capacitors: C1:100uF, C2,C4:10nF, C3:22uF.

Description:

• The First stage multivibrator is set to 5 hz, 50% duty cycle (on off 5 times in second ;) ).
• The second stage is a variable one. it varies from 15hz to 160hz
• When first stage in OFF state the second stage is ON -> High only
• When first stage is ON, The trigger circuit will activate second stage and low frequency pulses

Output graph:

PCB Layout & Project files:

• Multisim
• Cadsoft Eagle

If any problems, Comment below

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Simple 12V blinker (strobe) For Horns,Brakelight etc

Its a simple 555 Astable multi-vibrator circuit, for blinking 12V DC.

• It can be connected for brake light, blinking brake-lights draws more attentions than normal ones.
• Can be connected for horns for stroked sound (relay is needed).
• Can be used with LED strips.

Below schematic shows circuit of blinker.

Components:

1. U1: LM555
2. Resistors: R1:100 Ohm, R3:220 Ohm
3. Variable resistor (Potentiometer)R2 2K ohm
4. Capacitors: C1: 22uF(electrolytic),C2: 10nF (Ceramic or tantalum).
5. Transistor Q1 MJE200G or any NPN power Transistor
6. Diodes: D1: 1N4007, D2: 1N4745 (16V zener) -1 
7. Relay*.

* Ground may be body or battery -ve terminal.
*No need of 10K resister at output.

Connection for brake light:

PCB layout & Project files:

 

Project:

• Multisim Project: Downlaod

• Eagle cad PCB project : Download

If You have any problems, Comment below.

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