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lm386_amplifier [2017/12/02 14:05]
sdh7
lm386_amplifier [2017/12/02 15:05] (current)
sdh7
Line 23: Line 23:
   * External connection pins   * External connection pins
     * A+/A- (audio input?)     * A+/A- (audio input?)
-    * +/- (power)+    * +/- (power) (if using a 9V clip, just solder the clip directly instead of pins, but you'll want to hot glue some strain relief because it **will** fail eventually, otherwise)
     * S+/S- (speaker)     * S+/S- (speaker)
     * Cut the pairs of pins off of the 6-pin strip     * Cut the pairs of pins off of the 6-pin strip
Line 37: Line 37:
     * Cut off the anti-rotation tab     * Cut off the anti-rotation tab
     * Solder one pin, adjust, solder the other two.     * Solder one pin, adjust, solder the other two.
-    ​+  ​Speaker 
 +    * Use two headered wires. cut off headers at one end, and strip the remainder 
 +    * Solder stripped wires to tabs on speaker 
 +    * Insert header pins into S+ & S- 
 +   
 +Options/​Hacks:​ 
 +  * External speaker (i.e. a cabinet or something) 
 +    * Wire up header wires to a 1/4" jack instead of the speaker 
 +  * Additional gain 
 +    * Simple way: wire up a capacitor between pins 1 & 8 of the LM386 
 +    * adjustable way: wire up a 5k potentiometer between pins 1 & 8  
 +  *  Power switch 
 +    * Wire up SPST switch between power source and + on PCB
lm386_amplifier.txt · Last modified: 2017/12/02 15:05 by sdh7