In conjunction with poor quality board of the first version, I increased her a little and redid, and everything went like oil (in truth almost like oil, one condenser is still "hanging"). To say, I didn't even expect such a thing, although the first version of the board was slightly smaller and without a mask, but after the manufacture of the sector it turned out that the electrolytes would have to leave in the air. The reservation: what can get rid of the jumper R0, held in the legacy of the previous revision of the board, I noticed after the board was placed, therefore correct late and lazinessĪs you can see, sizes, khm, small. Tantalum capacitor 100 μF x 10 in x3 (the most expensive part).Įlectrolytic condenser 470 μF\u003e 10 V (I have 16 c) x2Īs a result, it turned out such a pretty "Pups": TDA2822L microcircuit in SOP-8 housing X1.
#8DIP SPRINT LAYOUT PATCH#
But then, just in case, I decided to add two patch to the wires to the crown, just about the reserve. As for food, it is even more interesting - immediately from the moment of the emergence of the idea, I decided that I would save the scheme from the CR2032 type tablet, the benefit of them there is a wonderful little holder, and since almost all SMD elements, then the saving of the place is good.
Since we collect a miniature amplifier, it is clear that the maximum number of items should be in the SMD execution, in particular, I managed to make everything but C4 and C5 in SMD (well, our electrolyte store under SMD installation).
There is nothing fundamentally incomprehensible in this scheme, the details are typical, so we will go immediately to an interesting thing, namely, to the choice of parts. The binding for it is minimal, and the UMPC scheme according to the datasheet has such a kind: That is, even with large powerful headphones, there is enough for the eyes (about that later). And, by the way, "Duri" he has 1 W per canal (with a 4-ohm load). Its features are two channels, the ability to power from voltage in the range of 1.8 - 12 V (single-polar), small losses, the possibility of inclusion on the bridge circuit and the presence of a solution in the SOP-8 case (not the most miniature in nature, but still quite compact). TDA2822L is a low-power low-voltage integral umzch, which has already been mentioned on this site (it seems like even more than once). Thille thinking, I went to the website of the regional seller of the radio components and came across the wonderful solution in the form of the TDA282L chip. Not so long ago, I had an idea to practice in the manufacture of miniature devices.