To optimize work efficiency and portability, Samsung has introduced a new flagship detector, the AccE Glass-Free Detector. The AccE Glass-Free Detector recently received 510(k) clearance from the U.S. Food and Drug Administration for commercial use in the USA. “Being at the forefront of advancing healthcare imaging, we have recognized the need for new solutions that…
Humidity Detector Circuit
Humidity detector detects the presence of moisture in our hands, and gives you indicator with the help glowing LED’s. This circuit can be used to test the stress, emotion or can be used as lie detector. As emotion and stress is not reflected by heartbeat, blood pressure and body temperature but in that case skin moisture also increases. And when skin become moist its resistance decreases. When a person speak lie its body resistance decreases. Therefore skin resistance is a good indicator for measuring stress level. When a person speaks lie physiology changes occur because of that body resistance decreases and now you can compare it with the result for normal question. This circuit is based on two IC namely CA3130 and LM3914 and LED’s to show you the stress meter with few more components. IC CA3130 is operational amplifier which combines the advantage of both CMOS and bipolar transistor on a single chip.
Light detector using LDR and astable mode of 555 timer
Many a times we need a device which should activate itself according to outside light (like when we open door of drawer it should lit up). We sometimes feel the [[wysiwyg_imageupload::]]need of some light activated device, such a device could be made from circuit presented here. This light detector circuit project uses a light sensitive element which activates the circuit in light and switches it off in absence of light.The light detector project presented here can be used in these applications: Such circuit can be used in refrigerators to automatically switch their light on or off corresponding to the status of door of refrigerator .It could be used as morning alarm, which switches on with morning sunlight. In drawers and wardrobes, on opening their door some light should automatically switch on.