FUTURE KIT FUTURE KIT HIGH QUALITY ELECTRONIC KITS HIGH QUALITY ELECTRONIC KIT SET FOR HOBBY & EDUCATION R àµ×͹½¹µ¡´éÇ LED áÅÐ àÊÕ§ RAIN ALARM WITH LED CODE 1228 SOLDERLESS STARTER KIT ªØ´¤Ô·äÁèµéͧºÑ´¡ÃÕ Figure 2. Circuit Assembling Figure 1.RAIN ALARM WITH LED circuit ǧ¨Ãàµ×͹½¹µ¡´éÇÂÊÑÒ³¨Ò¡LED áÅÐàÊÕ§ ǧ¨Ã¹Õéãªéá¼è¹à«ç¹à«ÍÃì ´éÒ¹ÅÒ·ͧᴧà»ç¹µÑǵÃǨ¨Ñº¹éÓ àÁ×èÍãËéá¼è¹à«ç¹à«ÍÃì´éÒ¹ÅÒ·ͧᴧ ÊÑÁ¼ÑʹéÓ ÊÑÒ³àµ×͹¨Ð´Ñ§¢Öé¹¾ÃéÍÁ¡Ñºä¿àµ×͹¨Ò¡ LED ¢éÍÁÙŷҧ෤¹Ô¤ -ãªéä¿àÅÕé§ 9VDC -¡Ô¹¡ÃÐáÊ¢³Ð·Ó§Ò¹ 28 mA -¢¹Ò´á¼è¹Ç§¨Ã¾ÔÁ¾ì 2 x 1.5 ¹ÔéÇ Technical Specifications - Power Supply : 9VDC - Current Consumption : 28mA - PCB dimensions : 2 x 1.5 in. http://www.futurekit.com A Figure A: Connection between 9V BATTERY SNAP CONNECTOR and PCB at 2 pins IDE terminal.After the circuit is connected completely, the circuit works. SPEAKER 8 0.25W PCB sensor FL1008-1 NPN B C E 6 TRANSISTOR B C E 2 DIODE 5 MILA CAPACITORS C .....F LED RED+ BLACK- POWER SOURCE 9V 9V SPEAKER 8 0.25W PCB sensor RED+ BLACK- POWER SOURCE 9V 9V ÃÙ» A: à»ç¹¡ÒÃàª×èÍÁµèÍÃÐËÇèÒ§ ¢ÑéǶèÒ¹ 9 âÇŵìà¢éҡѺἧǧ¨Ã àÁ×èÍ àª×èÍÁµèÍáÅéÇãËé·´ÅͧË´¹éÓŧº¹á¼è¹à«ç¹à«ÍÃì´éÒ¹ÅÒ·ͧᴧ 俨ҡ LED ¨ÐµÔ´¢Öé¹¾ÃéÍÁ¡ÑºàÊÕ§ÊÑÒ³àµ×͹ËÒ¡àªç´¹éÓº¹ á¼è¹à«ç¹à«ÍÃì´éÒ¹ÅÒ·ͧᴧÍÍ¡ 俨ҡ LED áÅÐÊÑÒ³àÊÕ§ ¡ç¨Ð´ÑºÅ§ This kit is a rain detector circuit, working on the water falling onto the conductive strips on the PCB, which will set off an oscillator of the transistors is to turn ON the speaker and LED. After you wiped out the water on the conductive strip's surface, the Speaker and LED are turned OFF. Figure A: Connection between 9V BATTERY SNAP CONNECTOR and PCB at 2 pins IDE terminal.After the circuit is connected completely, the circuit works. Circuit Testing: -Dropthe water onto the conductive strips of the PCB, the circuit starts alarming and LED lights up, thecircuit is turned ON. -Wipe out the water coating on the conductive strip's surface, the circuit is turned OFF. R ..... 1 RESISTORS LED 3 LIGHT-EMITTING DIODE K A LED DIAGONAL CUTTER LED K A + C .....F 4 DIAGONAL CUTTER + - + -