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Thrifty 2Hz Clock - CMOS circuits are known for their low current utilization. This is especially critical for battery-controlled circuits. Sadly, oscillators frequently require a lot of current. We along these lines propose this oscillator circuit that has a low current utilization (around 3 µA). The circuit is fueled from a sort LM334Z current source. The current has been set with R4 to around 3 µA.

Circuit diagram : 

This is adequate to control IC1 and the oscillator circuit around X1. The oscillator creates, with the guide of a modest watch precious stone and a couple encompassing parts, a sign that is in this manner connected to the divider in the 4060 and results in a recurrence of 2 Hz at pin 3 (yield Q13). The level of the yield heartbeats is a considerable measure lower than the ostensible 5-V power supply voltage (IC1 is after all controlled from a present source with low current). That is the reason the sign on pin 3 of IC1 is increased and rearranged by T1. IC3a at long last transforms it into a legitimate square wave with acceptably soak edge