How to Make LED Flashlight Circuit
by Creative World45 in Circuits > LEDs
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How to Make LED Flashlight Circuit
A mini LED flash light circuit is a simple and compact electronic circuit that uses a few components to power a small LED for illumination purposes. The circuit consists of a power source, an LED, and a resistor to limit the current flow to the LED.
The final circuit diagram and design can be seen above. We also thanks to our sponsor JLCPCB https://jlcpcb.com/RTA for sponsoring us PCB for this project.
Supplies
The article is being published in collaboration with JLCPCB. They supply high quality PCBs at a very reasonable price. They also can provide SMT circuit assembly.
We thanks to our sponsor JLCPCB https://jlcpcb.com/RTA for sponsoring us PCBs for this project circuit.
Thanks To JLCPCB.
$2 for 1-4 Layer PCBs.
Get SMT Coupons - https://jlcpcb.com/RTA
Component List
To make a mini LED flash light, the circuit can be enclosed in a small plastic or metal casing with a switch to turn it on and off. A small keychain or lanyard can also be attached to the casing to make it easy to carry around.
Additional components, such as capacitors or transistors, can be added to the circuit to control the brightness or flashing pattern of the LED.
All component list have to been given below.
Component List -
1. PCB - made by JLCPCB
2. LED - 5mm (10 Pieces)
3. Transistor - Tip 41c, BD 139
4. Resistor - 56 KΩ
5. Capacitor - 100µf/35v
6. Power Source - DC 12v
Transistor Pin Out
Tip 41 -
The pin arrangement may vary depending on the manufacturer or package type, but the pin functions remain the same.
1. Base
2. Collector
3. Emitter
BD 139 -
The pin arrangement may vary depending on the manufacturer or package type, but the pin functions remain the same.
1. Emitter
2. Base
3. Collector
Feature of LED Flasher Light
1. Low component count
2. Low power consumption
3. Adjustable flashing rate
4. Wide operating voltage range
5. Compact size
6. Easy to integrate
7. Reliable
8. Easy to modify
9. Low heat generation
10. Multiple LED support
Schematics and PCB Design
The schematics of PCBs can be seen above.
Make 12v LED Light
Since it is a 12v LED light project circuit, for that we need to use DC-12v led light. Though we are using 3v led light, for that we need to convert 3v led light to 12v led light.
We use 4 pieces 3v LED light to make a 12v LED light. We connect one LED positive leg with another LED negative leg. In this way we will leg a 12v LED light.
This way, we might make 2 pieces 12v LED light. Then we connect 2 pieces 12v LED light positive leg with each other.
Connect Transistor With Circuit
To make this circuit, 1st we connect one transistor with another transistor. We connect TIP41c transistor emitter leg with BD139 transistor emitter leg.
Connect Resistor With Circuit
Now we need to connect resistor with the circuit. We connect resistor one side with each other. We got three terminal of this LED light.
This time we connect resistor common side with LED positive leg and the rest two terminals with both transistor Base leg.
Connect Capacitor With Circuit
To make this circuit, we are using two pieces 100uf/ 16v capacitor. Now we connect capacitor with the circuit. Now we connect this two capacitor positive leg with both transistor Collector leg.
The capacitor positive leg connected with BD139 transistor, connect that capacitor negative leg with TIP41c transistor Base leg.
In the same way, the capacitor positive leg connected with TIP41c transistor, connect that capacitor negative leg with BD139 transistor Base leg.
Soldering and Cleaning
Neat and perfect soldering is an important part for all kind of PCBs. Since soldering, you should remember that, there should not be any kind of short circuit connection. After soldering all leg, we cut-off the extra leg of all electronics component.
We also can use liquid PCB cleaner to clean the PCB board.
Connect Power & Enjoy the Circuit
For power supply, we are using DC 12v. You can use 12v battery or can use the power supply that can provide DC 12v, then led light will blown away and the circuit may damage also.
Connect DC-12v positive cable with LED positive leg and connect DC-12v negative cable with emitter leg of transistor.
Again thanks to JLCPCB for best quality PCBs.
Steps to Order PCBs From JLCPCB
If you complete design of your PCBs, then it is time to order PCBs. To order best quality PCBs, just visit JLCPCB and click on the “QUOTE NOW” button.
Since 2006, JLCPCB continuously driven to become more efficient and to reduce costs. They promise to offer customers the most economic PCBs forever. JLCPCB makes cheapest but top quality PCBs possibly because of scale effect, extremely high production efficiency and less manpower cost.
You can order minimum 5 pieces PCBs for only $2 costs.
To order PCBs, make your Gerber file. Then drag and drop the Gerber file on the following box.
Click on “Gerber Viewer” button you can check the PCBs design. Make sure everything is good, then choose color, quantity and order your PCBs at very reasonable prices.
If you are a new user, then you can order 10 pieces PCBs, costing only $2. To place your order click on “Save to Cart” button. Confirm your shipping address and shipping method.
Steps to Order SMT PCBs From JLCPCB
To order your SMT PCBs, visit JLCPCB.
1. Drag and drop SMT PCBs file on site.
2. Choose your PCBs color and quantity.
3. To free SMT assembly for your PCB click on “SMT Assembly” button and then confirm.
4. Add your BOM file and CPL file.
5. Place your order click on “Save to Cart” button.
6. Confirm your shipping address and shipping method.
7. Pay your payment
8. Wait for confirmation mail.
9. For SMT Service, Click here. (https://cart.jlcpcb.com/quote?orderType=1&stencilLayer=2&stencilWidth=100&stencilLength=100&stencilCounts=5)
Shipping and Billing
JLCPCB supported all shipping method can be seen below.
Estimated Delivery Time
- DHL International Express 3-5 business days
- UPS Worldwide Saver 3-6 business days
- S.F Express (Standard) 5-8 business days
- S.F Express (Economy) 8-15 business days
- Singapore EMS 8-15 business days
- Post Link Registered Mail 15-20 business days
- ePacket 15-25 business days
- Registered Air Mail 15-20 business days
JLCPCB supported Payment method.
- PayPal
- Credit/Debit Care
- Prepaid wire transfer
Confirm PCBs Order
To confirm your order, pay your payment. Then accept PayPal, Credit/Debit Card, and Prepaid Wire Transfer. To manufacture your PCBs, it’ll take about 2 days. DHL will be fastest shipping method to arrive your ordered PCBs at your location.
All PCBs were well packed and quality was really good.
Thanks to JLCPCB for best quality PCBs.