Digital low-power programmable alarm clock for use with reflecta

Details Digital low-power programmable alarm clock for use with reflecta Digital low-power programmable alarm clock for use with reflecta

1990-07-31

1992-04-21

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368250, 356234, G04F 800, G01J 140

Patent

active

051074699

ABSTRACT:
A low-power programmable alarm clock system is provided for use with microprocessor-based reflectance photometer systems for generating an alarm control signal at pre-programmed alarm activation times. The system utilizes an alarm clock circuit which includes means for storing a count value corresponding to the number of predefined time periods existing between a given instantaneous time and a pre-programmed alarm activation time, means for generating a signal corresponding to the passage of each of said predefined time periods and using the generator signal to increment the stored count value each time the predefined time period has elapsed, and means for generating an alarm activation signal when the stored count value has been incremented to a predefined activation value. The programmable alarm clock circuit operates in conjunction with a transistor-based switching arrangement and the system microprocessor in such a way that the required count value is calculated and stored into a shift register/counter each time the reflectance photometer system is powered down and an alarm function is found to be activated. The alarm clock circuit then takes over and operates under negligible power consumption conditions and generates an alarm control signal which reactivates the overall system circuitry when the pre-programmed alarm activation time has been reached.

REFERENCES:
patent: 4684261 (1987-08-01), Arnold et al.
patent: 4690566 (1987-09-01), Robertsen
patent: 5012435 (1991-04-01), Bailey et al.

Affiliated with

Also associated with

Rating

Digital low-power programmable alarm clock for use with reflecta does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital low-power programmable alarm clock for use with reflecta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital low-power programmable alarm clock for use with reflecta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1592913