Multiple Power Supply Circuit for Project – JLCPCB

In this project, we’ll teach you making a multiple power supply circuit. It is a very cheap and useful SMT project circuit. To make different type project, sometimes we need different type voltage. As like 3.3v, 5v, 9v and 12v. For this case, we need to use different, different power supply. But using this small and cheap SMT circuit, you don’t need to use different power supply circuit.

To make this circuit, we use bridge power supply circuit formula, liner voltage regulator and a 12v (3 amp) transformer.

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 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 making this SMT multiple power supply circuit, we are using some SMD components. You can order your assembled SMT circuit form JLCPCB.

All components list have been given below –

Component List –

• Transformer – 12v
• Diode – 1N 4007 *4
• Resistor – 1 KΩ
• LED
• Capacitor - 1000µf / 25v
• Liner Voltage Regulator – 7812, 7809, 7805, 7803
• Output Sockets

Liner voltage regulator IC is an integrated circuit used in a variety of timer. This 3 pin integrated IC 3 different pinout.

Its 8 legs pinout can be seen above -

• In
• GND
• Out

The specialty of this IC is that, this IC can output fixed voltage.

• Highly efficient
• Heavy-duty
• Cost-efficient
• Short regulation times
• Small residual ripple
• Simple circuitry
• Small size
• Light weight
• Wide input voltage range
• Easy to regulate
• Highly efficient
• DC supply
• Buffering in case of mains voltage breakdown
• Easy to regulate
• Wide input voltage range
• Low mains pollution
• Excellent regulation
• Low ripple and noise
• Fewer series regulating transistors
• Lower power dissipation
• Higher efficiency than linear types
• Low operational costs
• Smaller regulator heat sinks
• Smaller in size and weight (for high switching rate)

To make this SMT multiple power supply power supply 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.

The schematics of PCBs can be seen above.

To make this SMT multiple power supply circuit, 1st we make a bridge connection with these 4 diode. Then connect diode positive leg with capacitor positive leg and connect diode negative leg with capacitor negative leg.

With this power supply, we also can use a power indicator led light. When the circuit receive power signal, then the led light glow.

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

Since it is a multiple power supply circuit, for this we need to use liner voltage regulator IC. We connect all liner voltage regulator IC “GND” leg with capacitor negative leg and all Liner voltage regulator “IN” leg with capacitor positive leg.

Now, we just need output voltage.

Now we just add 5 sockets with this circuit. In this 5 sockets, 1 socket will contain “GND” voltage and other sockets will contain DC 3, 5, 9 and 12 volt.

Our circuit is now, completely ready for use. Just plug-in transformer with input leg of PCB and use your needed voltage from this circuit.

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

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.

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.

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.