LONG LIFE BATTERY-Components Installed Vertical on Circuit Board
Components Installed Vertical on Circuit Board
Before, use the hollow insulating sleeve to cover the lead of the component.When the length of the sleeve is appropriate, the length of the lead from the component housing to the circuit board lead-in hole can be completely covered.Figs. 3 - 9 show how to put an insulating sleeve on a carbon resistance lead.
Experienced manufacturers often choose the vertical mounting method to reduce the size of the circuit board by using the vertical space.Sometimes two mounting methods are used simultaneously on the same circuit board.For example, if the size of the circuit board has been determined and the calculation is wrong when the production has started, and if the horizontal installation is adopted, the circuit board area will be insufficient, then the more convenient way is to change the larger components to vertical installation so that each component can be properly installed.As long as good production training is carried out from beginning to end, the mixed installation method can achieve satisfactory results.
The circuit wiring of the core 10 on the back of the drilled circuit board,
Figs. 3 - 10 show the back of a drilled circuit board.Note that the lead wires of the components are wound together after passing through the holes in different positions.Components that need to be connected to each other are arranged closer to the front of the circuit board so that their leads can be directly connected without using short connecting wires.It is sometimes necessary to use connecting wires, but this will increase the complexity of circuit making and should be avoided as much as possible.Remember, the simpler the wiring, the higher the reliability of the circuit.
After all the components are wound and connected to each other, check with the drawn circuit diagram.No matter the experienced producer or the reader who has just come into contact with the electronic circuit, some errors will occur more or less, which is quite normal.However, experienced producers will check all welding points repeatedly before starting welding.After welding, cut off all redundant component leads.
3 - 1 Tools for Manufacturing
The circuit in this book only needs common tools, of which the most convenient one is a small pointed-nose pliers.Pointnose pliers are used to bend the leads of components and wind the leads around the weld.The winding of leads is extremely important because the strong mechanical connection of components is achieved by winding.After studying this chapter, we will know that it is very important to have a firm mechanical connection between the wires before welding.Figs. 3 - u show how to bend the component leads to a 90 degree angle when the component is horizontally mounted on the drilled circuit board.This kind of work can only be done most conveniently with pointed-nose pliers.In addition, when welding components such as solid circuits with poor heat resistance, sharp-nosed pliers can be used to dissipate heat in order to avoid damage to the components due to heat from the electric soldering iron.
Another indispensable tool is diagonal pliers, as shown in Figure 3 - 12.It is used to cut off excess parts of component leads and remove components from the circuit board.In addition, diagonal pliers can also be used to strip the insulation from the wires and even to cut off the excess parts of the circuit board.
The electronic circuits in this book do not need to buy the finest and most expensive tools.However, it is also not desirable to use inferior and cheap tools.Both quality and price should be considered, and tools with moderate price and good quality should be purchased.The two tools mentioned above are the most commonly used tools by electronic circuit makers, so they must be of better quality.Quality tools have a short service life.An inexperienced producer often tries to continue making with damaged tools, but this will cause many hemp qualities, such as damaged components or poor wiring.Therefore, buying a set of high-quality tools at a moderate price from the beginning will be handy for future production.
In addition, a P - capable knife is also needed, which is very useful in circuit fabrication. It can be used to scrape off the insulation layer on the package line and also to remove solder accidentally falling between the component leads on the circuit board.
In addition, a wire stripper and four rotary chisels should be provided.Two of them are cross-shaped rotary chisels, one medium-sized and one small.The other two chisels are straight and can be the same size as the cross.
A set of inexpensive sleeve head is not absolutely necessary, but it is very useful for mounting circuit boards in metal or plastic housings.Some screws and nuts of various specifications can also be prepared.When installing a circuit board on an insulator or a small transformer on a circuit board, it is very convenient to have these hardware tools at hand.
Some other things, such as electrical tape, alligator clip, heat sink clip and heat shrink tube, can also be prepared at hand.The heat shrinkable tube can be sleeved on the bare lead of the component to prevent the lead from being short-circuited to ground or colliding with the lead of other components. After being heated, it will shrink and tightly wrap on the lead.When the components are installed vertically, it is especially necessary to use a heat shrinkable tube ... special tools for special installation will not be discussed here.Most electronic circuit makers and experimenters often have quite a large variety of tools, which can play their role from time to time.However, for those beginners who have just started to contact electronic circuits, when they purchase tools for the design items in this book, the tools mentioned above are completely sufficient.
If you don't have a special worktable, you can use the kitchen table, but take protective measures to prevent small pieces of component leads and falling solder from damaging the finish paint on the table.A vise will be useful sooner or later, but wells are not absolutely necessary.When a component is to be removed, the electric phosphine plate can be tightly clamped by the jaws of a pointed-nose pliers or vice - pliers.Because the lead of the component is from electricity.The front side of the road board penetrates and is wound on the back side, so it is often necessary to turn the circuit board up and down.Figs. 3 - 12 show a method ( 1 ) preferred by the author when making a circuit on a drilled circuit board.In order to put the edge of the circuit board on a pair of supporting wood blocks during manufacturing, the size of the circuit board should be slightly larger.Several pieces of wood can be stacked to adjust the height.In this way, the lead wires of the components can penetrate and bind from the front side of the circuit board without turning over the circuit board.In order not to move the circuit board, the circuit board can be fixed to the wood block by pushpins.Then tie up the leads, pull out the pins and turn the circuit board over to make the back face up when you start welding the connection points.After soldering, cut off the excess component leads and trim the circuit board to the required size with a diagonal pliers.Since most of the designs in this book actually require a smaller circuit board size than the standard circuit board sold on the market, cutting off the circuit board is not a waste, and in most cases it is a little bit.