6 Digits DIY Clock Kit Auto Display Time DIY Alarm Clock …, Brisbane

Description 1 This product is a 24 hour digital circuit clock using CD4518 CD4511 CD4081 CD4013 CD4060 and other chips The circuit does not contain a microcontroller so there is no program The hours minutes and seconds can be adjusted and it does not have an alarm clock function This kit is mainly composed of a second signal generator a counter a decoding display and a timing circuit The second pulse is accurately divided by the high frequency signal generator to obtain a 1HZsquare wave signal and the timing is relatively accurate 2 The second signal generator consists of CD4060 and CD4013 which generates asquare wave signal with a frequency of 1HZ CD4060 is a 14 level binary frequency divider oscillator It forms a 32768HZ oscillator with external resistors R44 R43 C1 C2 and Y1 After 14 levels of binary frequency division asquare wave signal with a frequency of 2HZ is obtained at pin 3 CD4013 contains two independent D flip flops One of the flip flops is configured as a binary counter through wiring The second signal can be obtained by binary counting the input 2HZsquare wave signal CD4518 is a double decimal adding counter Use three CD4518s to time the hours minutes and seconds The hours are configured in 24 digit format and the minutes and seconds are configured in 60 digit format The counting result of CD4518 is output from pins Q0 Q3 to BCD decoder CD4511 in the form of BCD code CD4511 converts the BCD code into a display segment code