Boncuk
New Member
Why do we have 4 months (about 122 days) and 156 posts about this extremely simple circuit??
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Why do we have 4 months (about 122 days) and 156 posts about this extremely simple circuit??
This is a typical example of "How not to design a PCB".
You're using the wrong layer for the traces. Using the bottom layer (16) for traces and the tPlace layer (21) for components you'll obtain a "look through the board" image. Using the top layer for traces you'll have to solder components from the component side, which is impossible since the solder pads will be obstructed by the part itself.
Using a double sided board with plated through holes the board is easier to populate and solder.
Further there are lots of acute and odd angles in the traces which will most likely lead to unsatisfactory etching results.
Last not least there are components overlapping each other from their size. How are you going to place those properly?
Why didn't you refer to my PCB design? I guess the PCBs are also smaller than yours.
Boncuk
i will turn the tracing paper...
its because your PCBs provided seem cant been edit , some trace are wide , some trace are small ... and my college printer seem cant support to print it... that why i redesign it ....
there wont be overlapping on component, because i was using more larger component's size to design , this is why my design is bigger than yours ....
for the switch , is this leave the no2 no connection?
and i not understand what's the(20), (16) and (17) mean...
DTDP switch got many type? My DTDP switch is ON, OFF, ON .... when supply to mid(2 & 5) , switch left to on LED on right , Switch right to on LED on left....
but if i follow the connection provided, the D1 (silent) cant light up but its just a small problem , the main problem is the circuit can't function well
It is obvious that R5 is the collector load resistor for both transistors in the first schematic in this thread.1)i want to ask , what the purpose of 2.2k ohm resister (R5)
The IC should be cool. It gets hot when something is missing or connected wrong.2)the IC is easy get hot after speak, after making the shielded container , the problem can be solved?
The original circuit is perfectly symmetrical with a volume control at each speaker. Maybe the R11 and R18 attenuator attenuates too much.3)when speak at mice 1, the voiced out from speaker 2 is not as loud and clear as when speak at mice 2 to speaker 1, any solution can improve it ??
The IC should be cool. It gets hot when something is missing or connected wrong.