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lm386 quick/easy test circuit?

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spitso

Member
hi all

I have built the circuit shown below (audio amplifier using lm386). Replaced the chip today after i had destroyed the last one due to stupidly supplying wrong voltage polarities. I also added a diode to protect it, but as i connected it the chip gets hot aswell theres was smoke that came from the diode. 12v.

Is there an easy test circuit i can use to determin if me ic has blown again?
Anyone might think of the problem?

thanks
 

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duffy

Well-Known Member
If you got the power backwards (happens to everyone) you usually blow the chip, sorry. Get a new one.
 

Sceadwian

Banned
The lm386 probably went right after the diode.
 

MikeMl

Well-Known Member
Most Helpful Member
The simple gain of 20 audio amp shown on the spec sheet is about as simple test circuit as you could make.clik here.
 

audioguru

Well-Known Member
Most Helpful Member
Spitso,
The schematic that you attached didn't appear. Please attach it again so we can see what it is missing.
 
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