TTA-1943 Make LED Flashlight Circuit

LED flashers are semiconductor integrated circuits used to turn on and off groups of light emitting diodes either sequentially or according to a programmed pattern.

The flasher is built to offset the low amperage draw that LEDs operate on and will not cause rapid flashing. Additionally, the flasher relay has the unique ability to control the flash rate of the vehicles LED directional indicators. This can include, but is not limited to, light, fog, deck, and grill lamps.

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

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 lists have to been given below.

Component List -

• PCB - made by JLCPCB
• Transistor - TTA 1943
• Capacitor - 470µf/ 25v
• Resistor - 100 KΩ
• LED - 5mm
• Power Source - DC 12v

The TTA1943 is a PNP bipolar junction transistor commonly used in power amplifier circuits.

Please note that the pinout diagram of the TTA1943 transistor is the same as that of most other bipolar transistors. It is always important to check the datasheet of the specific transistor, as there may be some variation in pinout between different transistor models.

 Here is the pinout of the TTA1943 transistor:

1.      Base

2.      Collector

3.      Emitter

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

The schematics of PCBs can be seen above.

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 negative leg with each other.

To make this LED flasher circuit, 1st we connect capacitor positive leg with "Base" leg of TTA-1943 transistor and make same connection with the rest transistor and capacitor.

Then connect capacitor negative leg with another transistor "Collector" leg and again make the same connection with the rest capacitor and transistor.

Now we need to connect resistor with the circuit. 1st we make a series connection between this two resistor. Then we connect these two resistors two empty terminal with both transistor "Base" leg.

From these two pieces 12v led light, we got three terminals. We got two separate positive terminals and one common negative terminal. We connect two positive terminals with "Collector" leg of two transistors.

Again thanks to JLCPCB for best quality PCBs.

For power source, now we need to connect power supply with the circuit.

For power source you can use 12v battery or 12v adapter.

Connect DC-12v positive cable with both transistor "Emitter" leg and connect DC-12v negative leg with 12v LED negative leg.

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.

Our circuit is completely ready for use now. We need to power switch ON and enjoy the effect of LED light.

Again thanks to JLCPCB for best quality PCBs.

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.

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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.

To order your SMT PCBs, visit JLCPCB.

1.     Drag and drop SMT PCBs file on site.

2.     Choose your PCBs color and quantity.

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JLCPCB supported all shipping method can be seen below.

Estimated Delivery Time -

• DHL International Express 3-5 business days
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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.