E Anti Sleep Alarm
E Anti Sleep alarm is a electronic device that attaches to normal spectacles and gives an alarm when eyes close for more than 1 second. It works on the principle of reflective light from the Eye and Retina.It will not give false alarm when a person blinks his eyes. Average duration of a eye blink 0.1 to 0.4 sec (use operation hysteresis circuit). It's designed in such a way that it takes into account the dark period.
When light is not reflected due to closure of eyes for more than 1 second an alarm sounds.
Our E anti sleep alarm is reliable and comfortable. Replaceable button cell battery.
Currently market available devices are tilting type, but tilting type anti sleeping alarm is not suitable for us because angle of protection is 15 to 30 degrees. Compared with our E anti sleep alarm when the eyes are closed 1 second alarm activates.
Circuit : Miniature surface – mount Ambient light photo sensor APDS-9004
op amp LM321 SOT 23 all component SMDs .