Frankly, if I gave the scheme – then this article would never have the internet. But by 'engineers' NPF 'SWEET' was absolutely a complete indifference to my problems, which superimposed on the sarcasm, and it is in relation to my despair, attempts to pass the job on time. KBS may not feel the same. Schemes of two versions 3 and 4, they are virtually identical except for small things, which is more accurate, I do not remember, in principle, the principle is important actions, and the scheme is for convenience. Scheme BUOK-4 (third version, click to enlarge) Schematic BUOK-4, (4 th edition) is a link to the image analysis of circuits Selection of basic components and SMD resistors and capacitors, voltage suppression, stabilizing power, LEDs, status. 1.
Let's start with the components. Usually try to unify the basic elements, ie a decision on RMA cells or DIP, and then we are working only with them. If you use 'Soviet' element base (well, you can not avoid it) then try to put it on the less responsible sections of these elements, well, etc. In BUOK going hybrid, and completely incomprehensible logic of the application of any components. That's what we see in BUOK – on the status (eg channel 1: R1, R2, R3, C1, C2, C3) of being subjected to powerful SMD resistors total of 19units, and high-voltage capacitors SMD total of 18units – are the products are expensive and I think pulling in total about 20-30% of the cost of the product. Why, for what purposes and objectives of using such expensive components? Why not apply the cheaper items? After all, the place is full, and the plot not very important ….