{"id":214,"date":"2023-07-05T11:52:56","date_gmt":"2023-07-05T11:52:56","guid":{"rendered":"https:\/\/www.knowledgesystems.sr\/?post_type=product&#038;p=214"},"modified":"2025-03-07T11:11:33","modified_gmt":"2025-03-07T11:11:33","slug":"finger-measuring-heartbeat-sensor-module-for-arduino","status":"publish","type":"product","link":"https:\/\/www.knowledgesystems.sr\/?product=finger-measuring-heartbeat-sensor-module-for-arduino","title":{"rendered":"KS3434 | Finger Measuring Heartbeat Sensor Module"},"content":{"rendered":"<p>*We chose a very high resistance resistor R1, because most<br \/>\nof the light through the finger is absorbed,it is desirable<br \/>\nphototransistor sensitive enough.Resistance can be selected<br \/>\nby experiment to get the best results.<br \/>\n*The most important is to keep the shield stray light into the<br \/>\nphototransistor. For home lighting that is particularly important<br \/>\nbecause the lights at home mostly based 50HZ or 60HZ<br \/>\nfluctuate, so faint heartbeat will add considerable noise.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>*We chose a very high resistance resistor R1, because most of the light through the finger is absorbed,it is desirable phototransistor sensitive enough.Resistance can be selected by experiment to get the best results. *The most important is to keep the shield stray light into the phototransistor. For home lighting that is particularly important because the lights at home mostly based [&hellip;]<\/p>\n","protected":false},"featured_media":216,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[31,32],"product_tag":[48,47],"class_list":{"0":"post-214","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-modules","7":"product_cat-sensors","8":"product_tag-heart","9":"product_tag-heartbeat","11":"first","12":"instock","13":"sold-individually","14":"taxable","15":"shipping-taxable","16":"purchasable","17":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=\/wp\/v2\/product\/214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=214"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=\/wp\/v2\/media\/216"}],"wp:attachment":[{"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=214"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=214"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=214"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.knowledgesystems.sr\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}