- #1
Pooya_M
- 5
- 0
Hi!
I was working on a circuit today.I soldiered all the capacitors, resistors, transistors,... just as the paper-guide said except the Microphone;Because it was said in there that if you want to use this kit as an earphone, simply solder the MIC to the board,else use a "shield wire(?)" to attach the MIC to it's slots...I assumed that shield wire is simply the ones that have some golden torn wires as their kernel...I used a 3.5 mm standard headphone
But after plugging the batteries, some irrelevant noise(not the environment sound) and sometimes continuous beep is heard (However, when I blow to the MIC some relevant noise can be heard)
WHERE IS THE PROBLEM?
My suspects[!]:
-the "shied wire"?
-mis-soldering the shield wire to the MIC?
-mis-soldering the battery wires?
-I misplaced a 4.7 capacitor in a 0.47 capacitor,then I desoldered it with lots of troubles[!]. Perhaps the capacitor failed?
This is a picture of my cuisine[!]:
http://i52.tinypic.com/339n0qg.jpg
I will be glad if you help...
Thanks
I was working on a circuit today.I soldiered all the capacitors, resistors, transistors,... just as the paper-guide said except the Microphone;Because it was said in there that if you want to use this kit as an earphone, simply solder the MIC to the board,else use a "shield wire(?)" to attach the MIC to it's slots...I assumed that shield wire is simply the ones that have some golden torn wires as their kernel...I used a 3.5 mm standard headphone
But after plugging the batteries, some irrelevant noise(not the environment sound) and sometimes continuous beep is heard (However, when I blow to the MIC some relevant noise can be heard)
WHERE IS THE PROBLEM?
My suspects[!]:
-the "shied wire"?
-mis-soldering the shield wire to the MIC?
-mis-soldering the battery wires?
-I misplaced a 4.7 capacitor in a 0.47 capacitor,then I desoldered it with lots of troubles[!]. Perhaps the capacitor failed?
This is a picture of my cuisine[!]:
http://i52.tinypic.com/339n0qg.jpg
I will be glad if you help...
Thanks
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