?Doorbell Analog Circuit Electronic Soldering NE555 DIY Practice Kit DC 6V Electronic Doorbell C ??

1.Introduction:TJ-56-28 is a NE555 Doorbell Analog Circuit Electronic Soldering DIY Kit. It is an electronic doorbell control system. When the button is pressed, the horn makesa sound ‘dingdong~~’It is a very interesting DIY electronic product which enables users to understand the circuit more clearly and learn soldering skills.2.Feature:1>.Basiccircuit principle demonstration2>.Simpleand convenient operation3>.DIYHand Soldering3.Parameter:1>.ProductName: TJ-56-28 NE555 Doorbell Analog Circuit DIY Kit2>.WorkVoltage:DC 6V3>.WorkTemperature:-40?~85?4>.WorkHumidity:5%~95%RH5>.Size(Installed):41*19mm4.Component Listing:NO.ComponentNamePCBMarkerParameterQTY1Metal Film ResistorR130Kohm12Metal Film ResistorR2,R322Kohm23Metal Film ResistorR447Kohm141N4148 DiodeD1,D2DO-3525Electronic CapacitorC1100uF16Electronic CapacitorC210uF17Ceramic CapacitorC30.033uF 33318NE555U1DIP-819Black ButtonSW16*6mm1100.5W 8ohm SpeakerLS1111Wire10cm112AA*4 Battery BoxBT1113PCB41*19*1.6mm1Note:Users can complete the installation accordingto the PCB silk screen and component list.5.Installation Tips:1>.User needs to prepare the welding tool atfirst.1.1>.Soldering iron (<50 Watt)1.2>.Rosin core (“radio”) solder1.3>.Wire cutters1.4>.Wire strippers1.5>.Philips screwdriver2>.Please be patient until the installation iscomplete.3>.The package is DIY kit.It need finishinstall by user.4>.The soldering iron can’t touch the componentsfor a long time(1.0 second), otherwise it will damage the components.5>.Pay attention to the positive and negativeof the components.6>.Strictly prohibit short circuit.7>.Install complex components preferentially.8>.Make sure all components are in rightdirection and right place.9>.It is strongly recommended to read theinstallation manual before starting installation!!!10>.Please wear anti-static gloves oranti-static wristbands when installing electronic components.