Logic PROBE WITH PULSE 逻辑脉冲探头

图3 Logic PROBE WITH PULSE 逻辑脉冲探头

器件清单:
R1 = 1K C1,C2 = 0.01uF (10 nanoFarad)
R2 = 150 ohm T1 = 2N2219(A), NTE123, or TUN
R3 = 150 ohm D1 = 1N914
R4 = 3K3 IC1 = 7400, quad 2-input NAND gate
R5 = 20K IC2 = 555, timer/oscillator
R6 = 390 ohm Led 1,2,3 = Red,Green, Yellow. Ultra bright, 3mm
R7 = 150 ohm S1 = Switch, on-off