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1. Description:
The signal generating part of the second counter is composed of an integrated circuit CD4060.
2. Principle:
CD4060 contains an oscillator, the oscillator circuit can be connected to RC or crystal oscillator, the circuit is connected to a 32768Hz crystal oscillator, the use of crystal oscillator can get stable oscillation signal is very accurate, oscillating signal after 14 frequency divider circuit output of all internal CD4060 different frequency signal, after 14 minutes after the frequency, from Q14 (3 feet) the output frequency is 2Hz square wave signal. Integrated circuit CD4013 is composed of 2 frequency divider circuit, the output of the 2Hz signal processing, finally get the signal 1Hz seconds, you can get 1Hz square wave signal in the test point A in the test point is a sawtooth wave signal 1Hz.
3. Warm tips:
This is the delivery suite of parts, you need welding installation. SCM has written procedures, successfully tested.
4.Component List:
NO. | Component Name | PCB Marker | Parameter | QTY |
1 | CD4060 | IC1 | DIP-16 | 1 |
2 | CD4013 | IC2 | DIP-14 | 1 |
3 | IC Socket | IC1 | DIP-16 | 1 |
4 | IC Socket | IC2 | DIP-14 | 1 |
5 | Metal Film Resistor | R1 | 10M | 1 |
6 | Metal Film Resistor | R2 | 470K | 1 |
7 | Metal Film Resistor | R3 | 10K | 1 |
8 | Ceramic Capacitor | C1,C2 | 30pF | 2 |
9 | Ceramic Capacitor | C3 | 0.1uF 104 | 1 |
10 | Crystal | Y1 | 32768Hz | 1 |
11 | Male Pin | J3,J4,CP | 2x2P | 3 |
12 | PCB | 38*56mm | 1 |