This Simple Motor Powered Emergency Flashlight Circuit provides an easy way to create emergency lighting; it uses a motor as a generator to produce electrical power.
Also, power goes to LED for light and charges the supercapacitor and then it turns motor to charge.
Circuit Working:
Parts List:
| Components | Values | Quantity |
|---|---|---|
| Resistors | 220Ω 1/4 watt | 1 |
| Semiconductors | Super Capacitor | 1 |
| DC Motor | 1 | |
| LED any 5mm 20mA | 1 | |
| Schottky Diode | 1 | |
| Push Button | 1 |
To make motor flashlight, first understand how circuit works.
Motor spins and make electricity and we use this power to turn ON LED light, then power goes into special part called supercapacitor which stores power.
After that, LED stays ON longer when used supercapacitor and not direct motor, like how water gate controls water the same diode control power direction.
Then Schottky diode stops power from going back to motor but it only goes to capacitor and this keep motor safe and that is why Schottky diode is better than normal diode.
Furthermore, LED is light part in which supercapacitor gives power to LED, like water valve it stops too much power to LED and this protects the LED.
Push button switch control when LED turns ON.
Spin motor shaft like blow fan and make power and and this power stores in capacitor, hence, when we press switch the power goes to LED and light turns ON.
Formulas:
This is how to make emergency light using motor; DC motor work like generator and it charges the supercapacitor and the supercapacitor give power to LED for light.
Also, some important formulas for this kind of circuit are:
Supercapacitor Charging Time:
Use this formula:
Tcharge = R × C × ln(Vcapacitor / Vinitial)
where:
- R is resistance in motor inside + outside resistor
- C is supercapacitor size with capacitance
- Vcapacitor is full voltage of supercapacitor
- Vinitial is voltage at start
LED Resistor:
To stop too much current in LED we used resistor and below is the formula:
RLED = (Vsupply − VLED) / ILED
where:
- Vsupply is supercapacitor full voltage
- VLED is LED voltage drop
- ILED is how much current LED needs like 20mA
This circuit is easy and good for emergency light and we spin motor by hand to charge, supercapacitor save energy and LED gives light.
Ensure we connect all parts correct and also choose right values for our parts to work well.
How to Build:
To build a Simple Motor Powered Emergency Flashlight Circuit follow the below mentioned steps:
- First, gather all parts like in circuit diagram above.
- Next, connect supercapacitors positive leg to positive and negative leg to negative.
- Then connect DC motors one wire to positive and other one to negative.
- Put Schottky diode and push button to positive line and then add resistor R1 and LED from positive to negative.
Conclusion:
To conclude, this Simple Motor Powered Emergency Flashlight Circuit need no battery as it is easy to make and works well.
Here, motor spin makes power and supercapacitor stores power through which LED gives light; also resistor protect LED and control the brightness and diode help charge better.
Finally, now spin the motor and enjoy free power!