Mini Power Amplifier Circuit – JLCPCB

In this project, we’ll teach you making a mini amplifier circuit. A mini amplifier is small enough to be portable and compact while still allowing enough amplification to be useful in certain settings. Smaller amps allow you the flexibility of getting the sound you might want in a smaller package. A power amplifier (PA) converts a low-power signal to a higher power one. Two common examples are audio amplifiers, used to drive loudspeakers and headphones, and RF power amplifiers, such as those used in the final stage of a transmitter.

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 –

• Mosfet – IRF Z44n
• Resistor – 10 KΩ
• Capacitor – 47/ 16v
• Audio In Cable
• Power – DC 12v
• Diode – 1N 4007
• Ceramic Capacitor - 1 µf
• Speaker

The metal–oxide–semiconductor field-effect transistor, also known as the metal–oxide–silicon transistor, is a type of insulated-gate field-effect transistor that is fabricated by the controlled oxidation of a semiconductor, typically silicon.

Its 3 legs pin-out can be seen above.

• Gate
• Drain
• Source

• Output power.
• Distortion.
• Gain.
• Frequency response.
• Impedance.
• Sensitivity.
• Signal-to-noise ratio.
• Crosstalk.

To make this mini power amplifier 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 Mini Power Amplifier Circuit, 1st we connect 10 KΩ resistor with “Drain” and “Gate” leg of Mosfet. Then we connect 47µf/16v capacitor with the circuit. We connect this capacitor positive leg with “Source” leg of Mosfet. Now we connect this capacitor negative leg with audio input ground cable.

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

Now we make a parallel connection with this 1µf ceramic capacitor. Then we make a series connection with 3 pieces rectifier diode. Then connect ceramic capacitor with diode negative and positive leg.

We also make a series connection with this 3 pieces resistor. Then connect resistor 1 terminal with diode positive leg and connect it’s other terminal with positive leg of DC 12v.

For input power, we are using DC 12v. We connect DC 12v positive leg with 1 terminal of sound speaker and connect DC 12v negative cable with source leg of Mosfet.

To get output , we need to connect a sound speaker. Sound speaker 1 terminal is connected with power source and we connect it’s other terminal with “Drain” leg of mosfet.

Finally connect audio input L/R cable with “Drain” leg of mosfet and our amplifier circuit is now ready for use.

Just connect mosfet with heat sink and plug-in power then enjoy the music.

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.
• 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.