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BN9 PARTS LIST
❒
2 .01µF ceramic disk capacitors (C1, C2)
❒ 3 4.7µF or 10µF electrolytic capacitors (C3,C4,C6)
❒ 1 100µF to 500µF electrolytic capacitor (C5)
❒ 1 220K ohm resistor (red-red-yellow) (R1)
❒ 1 10K ohm resistor (brown-black-orange) (R2)
❒ 1 NPN transistor, 2N3904 (Q1)
❒ 1 LM380 audio amplifier IC (U1)
+8 to 15VDc
gnd
speaker (not included)
Microphone
(not included)