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RB1 7
RAMSEY RB1 PARTS LIST
Semiconductors
❒ 1 4001 Quad dual input NOR gate (U3)
❒ 1 XR-2209 voltage controlled oscillator (U2)
❒ 1 NE555 timer (U1)
❒ 2 2N3904 NPN transistors (TO92 package marked 3904) (Q3,4)
❒ 2 221-334 PNP transistors (Flat TO92 package marked 221-334) (Q1,2)
❒ 1 1N4002 rectifier diode (D1)
❒ 1 Large red LED (D2)
Resistors
❒ 4 6.2 ohm resistors [blue-red-gold](R12,R13,R14,R15)
❒ 1 2.2K ohm resistor [red-red-red](R16)
❒ 1 3.9K ohm resistor [orange-white-red](R10)
❒ 1 4.7K ohm resistor [yellow-violet-red](R8)
❒ 1 6.8K ohm resistor [blue-gray-red](R7)
❒ 2 10K ohm resistors [brown-black-orange](R6,R11)
❒ 1 22K ohm resistor [red-red-orange](R1)
❒ 2 47K ohm resistors [yellow-violet-orange](R5,R9)
❒ 1 100K ohm resistor [brown-black-yellow](R3)
❒ 2 150K ohm resistors [brown-green-yellow](R2,R4)
Capacitors
❒ 1 330uF electrolytic capacitor (C1)
❒ 3 10uF electrolytic capacitors (C4,C6,C7)
❒ 3 .1uF ceramic capacitors [Marked .1 or 104](C2,C3,C8)
❒ 1 .001 ceramic capacitor [Marked .001 or 102](C5)
Miscellaneous
❒ 1 3PDT power setting switch (S2)
❒ 1 SPDT power switch (S1)
❒ 1 Power jack (J1)
❒ 1 stereo jack (J2)
❒ 1 piezo power speaker horn (SP1)