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		varjag
Guest
Strictly speaking the circuit doesn't have to be digital, impulse is sufficient 🙂pvdhaar said:Anything that needs a battery is a digital watch. The battery drives a digital circuit that counts oscillations in a piece of crystal.
 
	 
 
 
		 
 
		 
 
		 
 
		 
 
		 
			 
			 
 
		 
 
		 
 
		 
 
		 
			 
			 
 
		 
 
		 
 
		 
 
		 
 
		