Here is one another application of one of the most versatile IC NE555, DIY Strobe light circuit. A strobe light is also called stroboscopic lamp and is used to produce regular flash of light. The general strobe light has very high flash energy of about 150 joules and very few millisecond of discharge time. Due to this property, it emits flash power of several kilowatts.
Various type of strobe light circuit using xenon flash lamp, flashtube, LEDs etc. posted in bestengineeringprojects.com are listed below :-
- High Brightness LED Strobe Using IC 555
- Strobe light circuit
- Strobe light using arduino
- High powered strobe light using arduino.
A small electronic strobe light circuit for dancing lovers can easily be constructed by using timer IC 555 and a triac. A car headlight or an ordinary lamp of 100W with a good reflector will work well.
Circuit description of DIY Strobe Light Circuit
The DIY strobe Light Circuit is built around timer IC 555 and a triac and very useful for dancing lover is shown in figure 1. The DIY Strobe Light circuit is very cheap and thus it’s cost is depends mainly on the nature of lamp used. You can also use old car headlight or 100W lamp.
Here, timer IC 555 is used in astable mode, where its changing time will depends on RC network consist of two resistor R1 and R2, two variable resistor VR1, VR2 and a capacitor C2.
The equation of changing time is
T1 = 0.693 (Ra + 2Rb)*C
Where Ra = R1 + VR1
Rb = R2 + VR2
During charging of capacitor C2 the output of timer IC (pin 3) is high which trigger gate of TRIAC1 and thus lamp is “ON”. Similarly, when charge across the capacitor reaches 0.67 Vcc, the output of timer IC goes low, thus triac does not connect and lamp is “off”. The capacitor discharge to a value of 0.33 Vcc, which is known as the trigger voltage level. As the trigger pin is connected to pin no 6, it receaves a negative trigger pulse and the next cycle starts.
Thus, the discharge time can be obtained as
T1 = 0.693 * Rb * C
And Duty Cycle is
Thus, by varying Ra and Rb, we can obtain strobes of required duration at required frequency.
This DIY Strobe Light Circuit can easily be converted into photographic timer where the doorbell is replaced by the lamp and the values of Ra and Rb are kept fixed to get % second pulses.
PARTS LIST OF STROBE LIGHT CIRCUIT
|Resistor (all ¼-watt, ± 5% Carbon)|
|R1, R2 = 1 KΩ
VR1, V R2 = 1 MΩ
|C1 = 1000 µF/16V
C2 = µF/10V
|IC1 = 555
TRIAC1 = TRF 840
D1 – D4 = 1N4007
|SW1 = ON/OFF switch
X1 = 220V to 9V, 250 mA step down transformer
L1 = 100W lamp