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×
LM324N QUAD LOW POWER OP AMP DIP14
1 × $290 -
×
LM339D MICROPOWER QUAD COMPARATOR SOIC14
1 × $230 -
×
LM358D DUAL LOW POWER OP AMPLIFIER SOIC8
2 × $300
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×
LM224 QUAD LOW POWER OP AMPLIFIER DIP14
2 × $350
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×
LM393AP DUAL DIFFERENTIAL COMPARATOR TI DIP8
1 × $540
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×
NE5532P DUAL LOW NOISE OP AMPLIFIER TI DIP8
1 × $990
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×
LM339N MICROPOWER QUAD COMPARATOR DIP14 TI
1 × $640
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×
LM358P DUAL LOW POWER OP AMPLIFIER DIP8
1 × $370
LM324N QUAD LOW POWER OP AMP DIP14 
LM339D MICROPOWER QUAD COMPARATOR SOIC14 
LM358D DUAL LOW POWER OP AMPLIFIER SOIC8 
LM393AP DUAL DIFFERENTIAL COMPARATOR TI DIP8 Subtotal: $4.360
