Bluetooth Circuits
- A Bluetooth circuit is the central part of a Bluetooth and contains components such as the integrated circuit, capacitors, and power source.
- The course supports wired-in audio, wireless stereo, Bluetooth module, and many more.
- We have professional standard reviewers that ensure strict quality control measures in every production process.
- We leverage advanced testing technologies, such as AOI Test, E-Test, X-RAY, and Impedance Control.
- We have an in-house PCB design and assembly process review, which ensures high-quality control. We are committed to helping you get the highest quality products and services at competitive prices.
- We use a wide range of PCB material options, such as FR4, High TG FR4, Rogers PCB, Metal-based PCB, and High-frequency Materials.
- We have a superior customer care department, which supports person-to-person services. Our customer care department is flexible and approachable if you want to make any updates before the production process begins.
Bluetooth Circuits
Capabilities
WellPCB is a reputable and professional PCB manufacturing and assembling company with roots in China. The table below shows some of the primary capacities that we provide and support. It contains information about the PCB materials we use, the PCB technologies we leverage, the types of products we manufacture, and our offer’s tolerances.
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Materials:FR4, High TG FR4, Halogen Free Material, CEM-3, Rogers HF Material
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Min.Contour Tolerance:+ / -0.1mm
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Layer Counts:2-36 Layers
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Min.Finished Diameter of PTH Hole:+ / -0.1mm
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Finished Copper Thichness:0.5-5 OZ
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Max.Board Thickness/Hole Ratio:12:1
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Finished Board Thickness:0.2-6.0mm
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Min.Solder Mask Bridge:4mil (Min,SMT Pad Space 8mil)
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Min.Line/Track Width:3mil
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Min.Legend(Silkscreen) Track Width:5mil
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MIN.Drilling Slot Size:0.6mm
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Surface Treatment:Leaded HASL, Lead Free HASL, Immersion Gold, OSP, Immersion tin, Immersion Silver, etc.
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Solder Mask Color:Green, Black, Blue, White, Yellow, and Matt, etc.
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Other Technology:Gold Finger,Peelable Mask, Non-across Blindried Vias, Characteristic Impedance Control, Riged-flex Board etc.
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Solder Mask Hardness:6H
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Legend/Silkscreen Color:Black, White, Yellow, and others.
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Wrap and Twist:≤0.7%
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Flammability:94v-0
The Bluetooth Circuits
Process
We use the data (Gerber file) that you send us to create the production information for your customized boards. Our experts match your specifications with the capacities for compliance purposes.
When we make the circuit board, the imaging process is what defines the circuit traces. The traditional imaging process needs a UV-light and photo tool to transfer images. At the same time, LDI only uses a computer-controlled, highly focused laser beam to define the circuit pattern onto the board directly.
Here, we leverage the etching process to eliminate any undesirable copper residues from the panel. After removing it, we remove the dry film to remain with a copper circuitry, which is in line with the PCB design. So basically, etching is the removal of undesired chemical and electronic residues.
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We apply an oxide layer to the inner board layers and then stack them together using prepreg to create insulation between them. Additionally, we should add copper foil to the upper and lower stack parts.
In this step, we bore the holes that will later act as electrical contacts in the multilayer board. Drilling is a mechanical process that PCB manufacturers optimize to obtain registration to the internal layer links. It is important to note that we can still do laser drilling. We have a laser drilling machine, which can drill 3-6mil vias.
First, we apply some thin copper layer deposits on the holes we drilled earlier on the walls. PTH offers the best copper deposits, which conceal the hole walls and the whole panel. And this is a chemical process that we should strictly regulate to plate sufficient copper deposits into the non-metallic walls. Secondly, carry out panel plating to get a thicker outer copper deposit.
Outer layer imaging resembles the internal layering process. However, in outer layer drilling, we get rid of the dry film and maintain the circuitry. Then plate the extra copper later in a clean environment.
This is the second electrolytic plating process, where we carry out extra plating in dry film parts (circuitry). After depositing the copper, we should apply tin to prevent the plated copper from oxidation.
First, we take out the dry blue film. Secondly, we scrape all the unwanted copper residues. The tin deposits resist the etching process, therefore, protecting the copper deposit we want. Lastly, we chemically eliminated the tin residues to leave behind the circuitry.
With the help of artwork and Ultraviolet light, expose some PCB parts and remove all the exposed parts. Then completely cure the remaining solder mask to create a quality finish.
Surface finish can maintain the exposed copper circuitry meanwhile provide a solderable surface when soldering components to the PCB. Usually, metallic and organic are the two main kinds of surface finishes. Metallic surface finish includes HASL, ENIG/ENEPIG, Immersion Silver, Immersion Tin, while organic surface finish includes OSP and Carbon Printing.
We will test all the boards before shipping to ensure all of the printed circuit boards are free of defects and meet the standards you expect. Currently, we have two different types of testing equipment available to test the circuit boards. Some test machines include a flying probe, fixtureless testers. And we also have universal grid testing capability. These machines use fixtures built specifically for your PCB. If you have impedance control requirements, we will also test the impedance value of the coupon.
Here, we route the PCB production panels into particular sizes and shapes according to the production file. PCB V-Scoring is a process of cutting a ‘V’ shaped groove at the top and bottom of a printed circuit board, leaving a thin layer between the Vees. Once we have done this, it can easily separate the PCB Board at the V by applying minimal pressure.
In this step, a team of sharp-eyed individuals scrutinizes each product. The process involves visually examining the board in line with the set standards.
We pack your products by neatly wrapping them in materials that meet international packaging standards. Then we ship them through your preferred transport mode, mainly by DHL, FedEx, UPS, etc.
- Prototype orders placed within 24 hours
- Normal lead time (5-7 Wokring days for some PCBs prototypes and small batch production)
- Faster lead time (48 hours for some PCBs prototypes and small batch production)
why us
Since 2007, WellPCB has offered good-quality PCBs with excellent turnaround time and customer satisfaction. We are one of the biggest and most skilled board manufacturers in China. Our committed staff- with a rich experience in the electronic world- produce superior products, such as double-sided, single-sided, multilayer, and HDI PCBs.
Quickturn PCB Assembly
- PCB fabrication and parts procurement are carried out simultaneously, saving time
- Prototype orders placed within 24 hours
- Quote and Order Online at any time
Competitive Price
- Our price is one of the most competitive in the world
- Own factory with reasonable cost control, no hidden cost in it
- Accept T/T, cash, credit card, PayPal, bank transfer, etc.
- Our two factories have price support for different orders.
On-Time Delivery
- Standard methods are DHL and FedEx, door-to-door service. Average Shipping Time only 2-4 Days.
- Cooperate with two transportation companies for many years with discounted prices
- Anti-static+Moisture-Proof+Anti-Vibration Packaging; Inspection certificate
- Professional agent To Iran, Pakistan
Quality Assurance
- All products follow the IPC or UL Standards and the ROHS&REACH standards.
- 98% customer positive evaluation and satisfaction Standardized factory processes and management Multiple testing services
Return and Refund
- In case our PCB is not usable due to our fault, you can ask for compensation.
- We can refund your account directly or rework the unusable boards or re-fabricate your PCB and re-ship to you at our cost, but please cooperate to solve the problem if you need to rework.
PCB Factory Scale
We handle all production scales, including small, medium, and mass production orders.
Besides, we can deliver more than 10,000 products monthly.
We have competitive prices and unbeatable offers for volumes ranging from as small as 1 square meter for you.
Our Certifications
Here are the certificates we have:
IATF 16949:2016 ISO 9001:2015 ISO14001:2015 ISO13485:2016 UL Also, all our products follow the IPC & ROHS Standards. More importantly, we always strive to manufacture high-end PCB products.
Bluetooth Circuit – About Its Basic Introduction
A Bluetooth circuit is the central part of a Bluetooth and contains components such as the integrated circuit, capacitors and source of power. The course supports wired-in audio, wireless stereo, Bluetooth module and many more.
The IC contains a charger and voltage regulator. The Bluetooth module includes information on the configuration and the setting.
The Bluetooth connection operates at 2.4 GHz range. In the operation of the Bluetooth devices, there is the primary device which can be referred to as the master device which is then connected to other mini devices often referred to as ‘slaves.’
Now please follow me to learn more about Bluetooth circuits.
Table of Contents
A Bluetooth circuit is the central part of a Bluetooth and contains components such as the integrated circuit, capacitors and source of power. The course supports wired-in audio, wireless stereo, Bluetooth module and many more.
The IC contains a charger and voltage regulator. The Bluetooth module includes information on the configuration and the setting.
The Bluetooth connection operates at 2.4 GHz range. In the operation of the Bluetooth devices, there is the primary device which can be referred to as the master device which is then connected to other mini devices often referred to as ‘slaves.’
Now please follow me to learn more about Bluetooth circuits.
Bluetooth Circuit
1.1 Definition
With the advancements made every day in the technology niche, life becomes more accessible and more comfortable. Since most human needs have gotten solutions through technology.
Bluetooth technology is yet another advancement that has made communication between devices seamless.
The Bluetooth technology is a significant advancement from the legendary wires and cables that have been the most used method of communication between or among devices.
The other form that has been used to communication devices is the application of radio signals, infrared signals, and wireless technology.
The Bluetooth technology is an advancement from the previous infrared technology. In the infrared radiation technology, you could only connect two devices at the same time thus posing a significant disadvantage.
With Bluetooth connectivity, you can connect multiple devices at the same time and transmit data too.
One example of the application of infrared technology is the remote control system.
The remote control system works by what is popularly known as the ‘line of sight technology’ which means that you must point the remote at the target for it to work.
This kind of technology is limited and thus reduces the applications and uses in different areas. The Bluetooth connectivity is different in the sense that it can be used anywhere so long as you are in the range of the radio signals that it utilizes.
A Bluetooth circuit, therefore, works by the use of radio signals. In most cases, the frequency that has been set aside for the Bluetooth connectivity is 2.4 GHz. However, this is not entirely the case as other devices also make use of this frequency posing a possible interference.
Luckily due to technological advancements, the Bluetooth circuit uses low power signals to avoid any interruption from the other devices. That is, therefore, the reason why most Bluetooth devices only work within a range of 10 meters out of which the connection can be lost.
The Bluetooth circuit consists of several PCBs that come with multiple components such as diodes, resistors, and capacitors. The PCB may be assembled in two layers on both sides of the plate. The chip processes the signals fetched from the antenna then generates an output.
1.2 Bluetooth Circuit Board
A complete Bluetooth circuit board must contain an antenna that helps to send and receive information. A Bluetooth circuitry must include at least two inductors whose job is to fine tune the antenna’s impedance to enhance performance.
There is also another secondary circuit board located inside the speaker. It connects the audio line, power button, and USB power. The secondary board comes with two LEDs.
1.3 Bluetooth PCB
Bluetooth PCB technology is a communication technology that operates at a range of 2.4GHz. It is a radio frequency range that makes use of the Wi-Fi technology.
The Bluetooth communication has a master device that is remotely connected to a maximum of seven slave devices. It covers a distance of 10m maximum.
Bluetooth devices communicate by exchanging unique codes and so will only work if there is approval from the other user.
The presence of a PCB close to the antenna may lower the resonance frequency. And so it is recommended that the thickness of the PCBs used in Bluetooth should be about 1,6mm.
It is also recommended that you don’t place any metal including copper anywhere near the area marked GND and the GND pins need to be connected to the plane. Switching the vias could be done to avoid any emissions from the PCB.
A Bluetooth connection allows the transferring of stereo signal from the two wireless devices. The headset will act as a bridge and will deliver audio signals to the two devices. For smooth transmission of signals. It is necessary that a few wires should be soldered to the PCB to allow for signal transmission.
The PCB is soldered at the bottom of the enclosure. It can be observed by opening the front cover and removing the plastic enclosure depending on the design of the PCB.
Bluetooth Transmitter Circuit
A Bluetooth transmitter circuit facilitates the transmission of music to the stereo. It also enables the pairing of your Bluetooth with other devices to allow you to enjoy wireless music. The circuit must have a charging system and a recyclable battery.
The transmitter circuit contains some components including LED indicators. The course allows the transmitter to connect to your device immediately it is switched on.
It is also designed in such a way that it can be in a standby mode until a request is sent to the transmitter.
The recyclable battery that is found in a Bluetooth transmitter circuit can last for a period of up to 10 hours. In such a case, a lithium battery is most preferred since it is long lasting.
It ensures that you can listen to the music over an extended period without the battery running out.
The cell contains a small circuit whose purpose is to protect it from over-current, over discharge, over-charge voltage, and short course.
Notice that the services offered by the speaker are handled in the main primary circuit board. The section of the circuit board consists of voltage regulation, battery charging, Bluetooth and audio amplification.
At the end of the board, you will get a microphone with volume up/down /pause control.
Bluetooth Circuit Board Kit
The Bluetooth circuit has a board kit that ensures you effectively play music or any other content that’s from your phone. That achieved wirelessly through advanced technology. The Bluetooth circuit board is available in three formats:
- As a single entity.
- With 65mm speakers.
- With 100mm speakers.
The Bluetooth circuit board ensures seamless audio quality and connectivity as it is a vital part of the Bluetooth devices. It is the central part that controls the entire device. Without this kit, the connectivity and complete functionality of the Bluetooth device would be paralyzed.
It is light in weight thus being advantageous in the sense of manufacturing different devices. That means that whichever the device you decide to design, you can easily incorporate the Bluetooth circuit board kit. It is used in both the small and large devices.
The interface for the circuit board kit is easy and straight to the point. The design of this kit is in such a manner that it tries to connect to the last device that it was paired to whenever the Bluetooth in the device is turned on again.
In cases where the device it was last paired to be off or not available, the Bluetooth circuit board kit is programmed to try and match with another device that is close to it or within its range.
The Bluetooth circuit board kit can be powered using two types of batteries
You can either use the 1A USB supply or LiPo battery. The board is also made with sounds and LED lights that would indicate the status of the Bluetooth connectivity.
Some of the features of this circuit board kit include the following:
- LED lights and sounds that may indicate the state of the Bluetooth connectivity.
- Enables devices to play content seamlessly through wireless connectivity.
- It is programmed to have a simple user interface which the user can quickly make use of. The design is such that you only have to use the on/off button to operate.
- It is designed to reconnect to the last paired device or pair to the closest device that is within range.
Bluetooth Audio Circuit
4.1 Bluetooth Audio Circuit Feature/Usage/ How to make and use
The Bluetooth audio circuit consists of the speaker which is typically constructed by melting the plastics to form the perforated grills. The course comprises of two speakers and a battery.
The battery has the circuit board that protects it from over-charge voltage, over discharge and overcurrent. It also contains an audio amplifier, which supports two outputs. It also consists of the 4558 Op- Amp.
Designing a Bluetooth circuit starts at the circuit design level. The design of the course depends on where the channel is to be applied. For instance, Bluetooth for low energy product should feature magnetometer, accelerometer, gyroscope, and sensors that measure temperature and humidity.
To construct the circuit, all you need is a Bluetooth Low Energy microcontroller, a crystal oscillator, tunable load capacitors and a 24 MHz crystal. You also require power pins, an IC, and a capacitor.
You also need a clean, stable voltage and power supply capacitor to filter and stabilize the power. May make use of a decoupling capacitor and a storage reservoir with a low impedance.
Note that to achieve a low impedance, it may require that you place a 1.0μF in parallel. A ferrite bead may also be included.
4.2 How To Make A Bluetooth Device Circuit
In making a Bluetooth circuit, you would need to start by creating a schematic for the circuit. In coming up with the schematic, you may need to use the software. According to the schema that you have, you can then get the necessary components that will help you to complete the circuit.
After that, you can connect the components following the lines that are in the schematic diagram you have. Your project can only succeed if you have the right schematic diagram. It shows the importance of the schematic.
One other thing that you need to factor in when making the Bluetooth circuit is the user interface. It is because the Bluetooth circuit is all about the user and how they will use it to achieve their needs.
You need to produce a Gerber file after you are done which you can then send to the manufacturing company for the Printed Circuit Board of the device. After verification of the design, the manufacturer then prints the circuit board.
Different types of devices utilize the Bluetooth technology. Generally, the headsets use smaller speakers.
The PCB layout is the most challenging part for starters. If you can create the design for the PCB, then you are good to go.
Different layouts could be used to assemble a Bluetooth circuit; however, you need to have a Bluetooth head start, switches, amplifier, LEDs and an enclosure. Ensuring that cables do not cross the head start is essential since it reduces Bluetooth range.
Also, the system should not be placed anywhere near transmitters because they impact and affect transmission.
Once all the required components have been assembled, you should then solder wires and the LEDs soldier the on and off wire onto the headset’s PCB.
Notice that it is possible to design the PCB to be used in your Bluetooth stereo. First, you need to choose the PCBs design that you are interested in. You also need to determine the number of layers that you need to have.
For Bluetooth, you need to have more layers. You should then assemble the following materials: epoxy, cotton paper, and epoxy.
When mounting the components, check the components type number and try to consolidate them to optimize their use. Once you are through with the placement, you can solder them by reflowing. You may use the infrared lamp or an oven to do this job.
Once the solder melts, it will permanently connect the components on the board. If there are components that cannot be mounted by the machine, it should be done manually.
Conclusion
The Bluetooth circuit is simple to design and make the type of circuit and requires only a bit of experience to come up with. The circuit is responsible for the connectivity of devices that would utilize the technology.
Many devices utilize the Bluetooth technology nowadays for different purposes, and this is due to the convenience it brings along. You can come up with the Bluetooth circuit using DIY methods, but in case you are not very sure of what to do, it is better to use an experienced manufacturer.
In case of any inquiries, you can contact us through the following leads:
Hommer
Hi, I am Hommer, the founder of WellPCB. So far we have more than 4,000 customers worldwide. Any questions you can feel free to contact me. Thanks in advance.