Page 47 - The Basics IA by ETron Circuit Labs

Here’s What You’ll Need...R4R3R1 R2B1RESISTORhole 8ahole 9a10 Ohm ' (Brown, Black, Black, Gold) hole 8ihole 19h220 Ohm - (Red, Red, Brown, Gold)hole 20bhole 21b1K $ (Brown, Black, Red, Gold) hole 19ahole 20a120K & (Brown, Red, Yellow, Gold) REDBLACK a b c d e 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 a b c d e f g h i j 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 f g h i j red = hole 29e black = hole 30hINTEGRATED CIRCUITIC 1Q1eholes 21f - 18fNPN 2N3904Collector hole 9gBase hole 8g8 7 6 5 holes21e-18e1234c bNPN TRANSISTOREmitter hole 7ghole 20h hole 21hhole 9j hole 14jW4 = 7j & 30j W5 = 20g & 19d W6 = 18g & 21dDISC CAPACITORSC1 103SPKR 10.01uFSPEAKERWIRESSCAN HERE TO SEE MORE ONLINEW1 = 21a & 30b W2 = 9e & 30a W3 = 21j & 30i45continuity, if there is continuity, the speaker will put out a tone.Procedure:Assemble the circuit and connect a 9-volt battery to the Battery Snap and touch the probe wires together and you should hear a tone from the speaker.Check Your Work HereLAB 23Did you know...Visit us online at www.ETronCircuit.com for more exciting projectsThis circuit can be used to check light bulbs, fuses, wires, and resistors for continuity. It is a very common circuit used by electronic technicians.