Transistor Made Flip-flop Circuit - JLCPCB

In this project, we’ll teach you making a led flip-flop circuit. A Flip-Flop LED flashing circuit is a basic circuit that produces a continuous square wave blinking output. In this project, we are going to design a simple Flip-Flop LED Flashing Circuit Using a stable multi vibrator.

The heart of this circuit is S-9013 transistor. This difference causes one transistor to turn on fast than the other when power is switched on for the first time. The flashing period is approximately the product of this resistance and the capacitance which is about 1 sec. The 560Ω resistors set the LED current and may be reduced for lower battery voltage.

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 this wireless power transfer circuit, we might need some electronics component.

All components list have been given below –

Component List –

• Transistor – S9013
• Resistor – 560 Ω
•                  10 KΩ
• Capacitor - 100µf/ 25v
• LED (Red, Green, Blue) – 3 volt
• Power Source – DC 12 volt

A transistor is a miniature semiconductor that regulates or controls current or voltage flow in addition amplifying and generating these electrical signals and acting as a switch/gate for them.

In a simple word a transistor is a solid-state electronic device that is used to control the flow of electricity in electronic equipment and usually consists of a small block of a semiconductor

Its 3 legs pin-out can be seen above -

• Gate
• Drain
• Source

FEATURES -

    Part No – S9013

• High Collector Current.(IC= 500mA）
• Power dissipation - (PC=300mW)
• Collector-Base Voltage – 40 volt
• Collector-Emitter Voltage – 25 volt
• Emitter-Base Voltage – 5 volt
• Collector Current –Continuous – 500 mA
• Collector Dissipation – 300 mW
• Junction and Storage Temperature – 55~150 C

To make this mini flip-flop circuit, we might need some electronics component. JLCPCB has its own parts library. JLCPCB has 200k+ in stock components, 24 hours rapid SMT assembly.

You can check SMT parts library here - https://jlcpcb.com/parts

The schematics of PCBs can be seen above.

To make this flip-flop circuit, 1^st we connect 3 pieces 10 KΩ resistor with “Base” leg of transistor. Then we connect 100µf/25v capacitor negative leg with “Base” leg of transistor and its positive leg with other transistor “Collector” leg.  We follow this process with the rest capacitor also and connect its empty terminal with 3 legs of 10 KΩ resistor.

We utilize JLCPCB https://jlcpcb.com/RTA to printout our PCB.

To make this flip-flop circuit we are using 3 different color LED light, as a like red, green and blue. For this 3 different color we make different set led light and we connect all LED negative leg with each other. Then we connect all red color led positive leg, blue color led positive leg and green color led positive leg.

Connect red color led positive leg with each other, blue color led positive leg with each other and green color led positive leg with each other.

Now we connect this 3 different color LED positive leg with 3 different transistor. Our circuit is now completely ready for use. You can use this circuit to decorate your home, office and can use any cultural program.

To operate this circuit, we need DC power source. We are using DC-12v power supply to operate this circuit. We connect dc 12v positive cable with that place, where 10 kΩ and 560 Ω resistor make series connection. The last connection is to connect dc 12v power supply negative cable. Just connect this cable with all transistor “Emitter” leg.

Our circuit is now completely ready for use. Just plug-in power and decorate your residential places.

Thanks to JLCPCB for offering us, this SMT PCB circuit.

Neat and perfect soldering is an important part of all kind of PCBs. Since soldering, you should remember that, there should not be any kind of short circuit. After soldering all leg, we cut-off the extra leg of all electronics component.

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.

• To order your SMT PCBs, visit JLCPCB.
• Drag and drop SMT PCBs file on site.
• Choose your PCBs color and quantity.
• To free SMT assembly for your PCB click on “SMT Assembly” button and then confirm.
• Add your BOM file and CPL file.
• Place your order click on “Save to Cart” button.
• Confirm your shipping address and shipping method.
• Pay your payment
• Wait for confirmation mail.
• For SMT Service, Click here - https://jlcpcb.com/smt-assembly

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
•        PostLink 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

To confirm your order, pay your payment. Then accept PayPal, Credit/Debit Card, Prepaid Wire Transfer. To manufactured your PCBs, it’ll takes 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.