Bluetooth PCB technology is a communication technology that operates at a range of 2.4GHz. This is a radio frequency range that makes use of WiFi technology.
The Bluetooth communication has a master device that is remotely connected to a maximum of seven slave devices.
It covers a distance of 100m max. Bluetooth devices communicate by exchanging unique codes and so will only work if there is approval from the other user.
1.Bluetooth technology
The Bluetooth circuit consists of several PCBs 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.
Note that 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 signals 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 signs, a few wires must be soldered to the PCB to allow for signal transmission.
Typically, the PCB is soldered at the bottom of the enclosure. It can be observed by opening the front cover and removing the plastic section depending on the design of the PCB.
2.Assembling A PCB Wireless Bluetooth.
To assemble a Bluetooth, a different layout could be used. However, it would help with a Bluetooth headstart, switches, amplifiers, LEDs, and an enclosure.
Ensuring that cables do not cross the headstart 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.
3.Designing the Bluetooth PCB
First, you need to develop a schematic fitted with all the components that you will need. You may use software to help you come up with a schematic.
After selecting the tool, you should then get the right components according to your schematic diagram.
Contact the specification of the element from the vendor’s website. Follow the datasheet and connect the lines to the relevant details.
Place the components on the schematic, and you will be ready to go. Note that the success of your project depends on the schematic diagram you come up with.
It will be a source of reference and will form the point of communication with your engineers. Place the components to your PCB and connect them between the layers.
The PCB should be divided into sections depending on its functionality. It helps you to keep the conductive traces short. This is critical, especially if you want to reduce interference and the conductive path.
Note that the user interface is critical and should be factored in as you design your Bluetooth PCB. Take care of components such as connectors, jacks, LEDs as you work on your PCB.
Once you create the layout, produce a Gerber file sent to the PCB manufacturing company to make your PCB.
Your PCB manufacturer will print the circuit after they have verified that your design is not faulty.
The manufacturer should help you source the components you indicated that you would use to make your Bluetooth.
4.Mounting the Components
It is the placing of components into the holes on the surface of your PCB, as shown below.
To do this successfully, you need to remember a few things:
First, check the component’s 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 the machine cannot mount, it should be done manually.
