Transformerless LED digital alarm clock

Details Transformerless LED digital alarm clock Transformerless LED digital alarm clock

1999-11-30

2000-11-14

Miska, Vit

Horology: time measuring systems or devices

Power supply details

Electrical

368241, 368250, G04B 100, G04C 300, G04C 1700, G04C 2100

Patent

active

061479357

ABSTRACT:
A transformerless LED digital display clock circuitry using AC line voltage as a primary source of power is disclosed. The AC line voltage is substantially reduced to around 10 volts or less and then rectified to provide DC power to the quartz analog clock. Also included is a NiCad battery circuitry used as a power backup and to allow for occasional but high current using devices. The LED digital display is made up of four separate "digit" displays each independently controlled by four separate cathode outputs from a microprocessor.

REFERENCES:
patent: 4198629 (1980-04-01), Marion
patent: 4201039 (1980-05-01), Marion
patent: 4697930 (1987-10-01), Roberts et al.

Affiliated with

Also associated with

Rating

Transformerless LED digital alarm clock does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transformerless LED digital alarm clock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transformerless LED digital alarm clock will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2071889