WEEK 23 - TEST LCD CIRCUIT

This time is for test response of lcd 16x2 with the gas sensor. The situation is when the gas detect the LPG gas, the red led on at the same time with the alarm triger and the lcd show  “DANGER”. The red led on and off or blinking in 10 time in 10 sec this it the same time with the lcd and alarm.  At this time also the all led has off and the fan side of led is on. At this time the led red,blue and all led is on this happen because the time between the “SAFE HOUSE” and “DANGER”. Actually the led is all off and the only on is red only in blinking condition. This has been set for safety because in the real situation when get the alarm in house all equipment electrical is shutdown, so no short circuit or equipment can be use.  In this condition also the fan is on, its represent the evacuation fan like in the tunnel fan evacuation so the gas is inhaled out.

After the “DANGER” situation the lcd is show “SAFE HOUSE”. When the gas in not detected the lcd show “SAFE HOUSE” as long as no gas is detected.  At this time the alarm and blinking red led  had been stop. No action from both component. At this time also the fan is in off condition, because no gas to evacuate. The blue led is on for show the house is safe.