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Low-cost Stopwatch

Low-cost Stopwatch

7169121IC3CD4033611141513103RBIVccSTROBELTGND5CoutR8271691215IC4CD40336112813103RBIVcc14R11431IC2CD40138971141061HZ1611IC1CD4060381012gfedcba3,810912467COMgfedcba3,810912467COMDIS1-DIS2 = COMMON CATHODE 7-SEGMENT DISPLAY (LTS543)S2DIS2LTS543DIS1LTS543C20.1μ2HZXTAL32.768KHzR1220KR210MR310KR4S1R181KR4-R17 = 330ΩS1 = ON/OFF SWITCHGNDC239pVC122p9VRESETR17R11R10Low-cost Stopwatch
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publish time: 2020-10-23
Circuit Everyday

This is the simple circuit of the stopwatch, which can time up to 99 seconds.The circuit USES CD4060, CD4013, CD4033, LTS543 and some discrete components.The crystal controlled oscillator generates a 1Hz pulse.For this purpose, 32.768kHz miniature crystals were used.

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