Brake Light Signal Module Circuit Schematic with explanation

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Brake Light Signal Module

This circuit, in particular, will emit a visual alerting signal of 4 short flashes, followed by a steady on light that remains steady on as long as the brakes are applied.



Brake Light Signal Module Circuit Schematic with explanation



Brake Light Signal Module



Parts:

R1_____________10K 1/4W Resistor
R2____________220K 1/4W Resistor
R3____________500K 1/2W Trimmer, Cermet or Carbon
R4______________1K8 1/4W Resistor (See Note)
R5______________1K8 1/4W Resistor

C1_____________47µF 25V Electrolytic Capacitor
C2______________1µF 25V Electrolytic Capacitor
C3_____________10nF 63V Polyester Capacitor

D1___________1N4148 75V 150mA Diode

IC1____________4060 14 stage ripple counter and oscillator IC

Q1____________BC327 45V 800mA PNP Transistor (See Note)

SW1____________SPST Brake Switch

B1______________12V Vehicle Battery



IC1 internal oscillator generates a square wave whose frequency is divided 64 times by the flip-flops contained in the chip in order to obtain about 1 to 4Hz at pin #4: this is the LED Array flashing frequency and can be set to the desired value by means of R3. A positive signal at D1 Cathode stops the oscillator after 5 pulses are counted. C2 and R1 automatically reset the IC whenever the brakes are applied. Q1 is the LED Array driver: LEDs will be on when pin #4 of IC1 goes low


Note:

* The transistor type suggested for Q1 will drive LED Arrays at currents up to 500mA. To drive Arrays requiring higher currents (up to 1A and even more) use a BD436 (32V 4A PNP Transistor) for Q1 and a 1K resistor for R4.

Door Alarm Circuit Simple with explanation

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Door Alarm Circuit Simple with explanation
This is simple door alarm circuit.You can attach this circuit for your for your main door If somebody opens it alarm will activate.Sw1 is a Read switch.Those switches are operated with magnets.





Door Alarm Circuit Simple with explanation

Parts:

Q1 = BC547
Q2 = BC327
B1 = 3V Battery
R1 = 330K
R2 = 100R
C1 = 10nF-63V
C2 = 100uF-25V
SW1 = Read Switch



Note

# Don't supply more than 4.5V for this circuit

#Attach a magnet for the door frame near by the read switch

Blinking LED Simple Circuit Diagram With Schematic and explanation

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Blinking LED Simple Circuit Diagram With Schematic and explanation

Hi Every one .Electronic lovers love LED circuit diagrams because they are very beautiful.So today I'm going to give you a blinking LED circuit Diagram.Already Free circuit diagrams 4U has given you blinking circuit diagrams but this circuit is operated with an famous IC called Ne555. And also this circuit can be operated with 9V to 15V. So you can easily use this circuit for your car or with your bike.enjoy this

Blinking LED Simple Circuit Diagram With Schematic and explanation

Note: Don't supply over 15V 
          Build this circuit on a pcb

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