General recommendations in the process of assembling a sound amplifier with your own hands with the order of work to be carried out. A simple circuit and printed circuit board of a transistor audio amplifier. The audio system of today is a large number of different devices, devices and tools. It is easy to understand that for their well-coordinated work and good sounding, you need to have a solid, powerful sound amplifier. Unfortunately, the aforementioned devices are most often sold as separate devices and, moreover, are very expensive. However, there is no need to be upset, because this device can be assembled at home almost independently. You can assemble the device with your own hands if you know how to properly handle a blowtorch, at the same time understand the elements of the electrical circuit, and besides, you love crafts of this kind.
To assemble your audio amplifier, you need the following tools:
a blowtorch (soldering iron), an operational amplifier, a digital receiver, parts for the body of the future unit, several auxiliary parts from the radio market, an active filter and a set of tools.
Taking into account personal experience of handling electrical appliances, you know that it is possible to assemble any device in several ways. The device you are assembling belongs to the same category. The passage of the implementation process depends on the design power, which the master expects, as well as on the assembly diagram of the device. It is very useful that there are a large number of options for the discussed assembly of such devices on the Internet, so the wizard is endowed with the opportunity to choose the most suitable one.
Before starting work, draw up an action plan, and make a list of the parts and elements needed. Of course, it would be better to purchase them right away than to be distracted from production later due to the lack of some tool, the necessary microcircuit or part to create the case.
For example, I propose a transistorized sound amplifier circuit for speakers to a mobile phone:
- Power: 2W.
- Power supply: 9V unipolar.
- Speaker: 0.5GD37.8Ohm.
- Consumption current: 25-30mA.
Next, prepare the PCB
Download the printed circuit board of the sound amplifier in lay format. It will be a reliable basis for all attached parts, which will ensure the correct, well-coordinated operation of the newly made amplifier. In order for the new device to work, you will need to observe the correct polarity of all elements, as well as the rules for their installation.
Do not forget about the handling of microcircuits, it does not tolerate haste. It will be possible to assemble the amplifier if the master fails to burn through the electrical circuit. In order to prevent such an oversight, work in an atmosphere of a calm atmosphere, do not rush in any way, and carry out the task as carefully as possible.
After fixing all the parts, interconnecting them to each other on the board, you need to start making the box-case for the future amplifier. This type of work should only be followed after you have managed to assemble all the microcircuits into one unit. The meaning of this is that the box needs to be adjusted to the working part of the new device, and not vice versa, as sometimes happens. So don't try to complicate your job ahead of time.
Perform the stage of testing the finished unit on good, obviously high-quality equipment and with the power that you expected to create the device for. Poor audio equipment is likely to have a detrimental effect on the future operation of the new device, moreover, it will certainly distort the sound of the assembled equipment.