I wonder if anyone would be kind enough to help? My aim is to amp a 20 second sound recorder module (link; http://www.mutr.co.uk/catalog/produc...a520f13b3a7377) I eventually plan to use relays to switch on and record automatically once amped through the se of a picaxe. The amp I am using is the LM386N-1. I have heard of user from this forum recommend these but have been experiencing many problems.
I copied the wiring diagram from; http://web.mit.edu/6.s28/www/schematics/lm386.htm
And have provided images of the circuit I am referring to @; http://www.putfile.com/album/185819
I have been using the headphone speaker provided because of fear of ruining the 8 ohm .2 watt speaker I plan to eventually use as I only have one. Every time I switch this circuit on the chip begins to get really hot! There is also no sound coming from the module not even a loud bang like I was expecting. This cannot be right I checked if the variable resistor worked and it did. the chip itselfs is receiving 5.6V however the voltage drops just below 4 volts when attempting to play back a sound clip. I also replaced the chip and guaranteed there was no shorting taking place under the board. stil the chip overheated. I suspect output from the twenty-second recorder module may cause some issues due to already being amplified. Any clues if anyone can help would be much appreciated!
I copied the wiring diagram from; http://web.mit.edu/6.s28/www/schematics/lm386.htm
And have provided images of the circuit I am referring to @; http://www.putfile.com/album/185819
I have been using the headphone speaker provided because of fear of ruining the 8 ohm .2 watt speaker I plan to eventually use as I only have one. Every time I switch this circuit on the chip begins to get really hot! There is also no sound coming from the module not even a loud bang like I was expecting. This cannot be right I checked if the variable resistor worked and it did. the chip itselfs is receiving 5.6V however the voltage drops just below 4 volts when attempting to play back a sound clip. I also replaced the chip and guaranteed there was no shorting taking place under the board. stil the chip overheated. I suspect output from the twenty-second recorder module may cause some issues due to already being amplified. Any clues if anyone can help would be much appreciated!
