Perfect Doorbell Electronic DIY Kit for Home Security 6V

There are many kinds of hardware products with different specifications, but hardware products play an irreplaceable role in home decoration. Choosing good hardware accessories can make many decorative materials safer and more convenient to use. There are more than 10 types of hardware products in the material market.
lock class
(1) External door lock (2) Handle lock (3) Drawer lock (4) Ball door lock (5) Glass window lock (6) Electronic lock (7) Chain lock (8) Anti-theft lock (9) Bathroom lock (10) Padlock (11) Combination lock (12) Lock body (13) Lock cylinder
handle class
(1) Drawer handle (2) Cabinet door handle (3) Glass door handle
Doors and windows
(1) Hinge: glass hinge, corner hinge, bearing hinge (copper, steel), pipe hinge (2) Hinge: heaven and earth hinge, torque hinge (3) Track: drawer track, sliding door track , folding door track, hidden door track, curved track, hanging wheel, glass pulley (4) latch (light, dark) (5) door suction (6) floor suction (7) floor spring (8) door clip (9) Door closer (10) Plate pin (11) Door mirror (12) Anti-theft buckle (13) Pressure strip (copper, aluminum, pvc) (14) Touch beads, magnetic touch beads
home decoration
(1) Universal wheel (2) Cabinet legs (3) Door nose (4) Air duct (5) Stainless steel trash can (6) Metal hanger (7) Plug (8) Curtain rod (copper, wood) ( 9) Curtain rod rings (plastic, steel) (10) Sealing strips (11) Lifting and drying racks (12) Clothes hooks and hangers
plumbing
(1) Aluminum-plastic pipe (2) Three-way (3) Wire elbow (4) Leak-proof valve (5) Ball valve (6) Eight-character valve (7) Straight valve (8) Common floor drain (9) Special floor drain for washing machines ( 10) Raw tape (11) Pump valve
Building Decoration
(1) Galvanized iron pipe (2) Stainless steel pipe (3) Plastic expansion pipe (4) Pull rivet (5) Cement nail (6) Advertising nail (7) Mirror nail (8) Expansion bolt (9) Self-tapping screw (10) Glass holder (11) Glass clip (12) Insulation tape (13) Aluminum alloy ladder (14) Goods support
Tools
(1) Hacksaw (2) Hand saw blade (3) Pliers (4) Screwdriver (slotted, cross) (5) Tape measure (6) Wire pliers (7) Needle nose pliers (8) Diagonal nose pliers (9) Glass glue gun(10)Straight handle twist drill(11)Diamond drill(12)Electric hammer drill(13)Hole saw(14)Open-end wrench and Torx wrench(15)Riveting gun(16)Grease gun(17)Hammer (18) Sleeve (19) Adjustable wrench (20) Steel tape measure, box ruler, meter ruler.
Nail gun, iron shears, marble saw blade
Putty Knife, Ash Spoon, Brick Knife, Shovel, Cleaning Spatula, Utility Knife, Ash Stirrer.
bathroom
(1) Basin faucet (2) Washing machine faucet (3) Delay faucet (4) Shower (5) Soap dish holder, soap butterfly (6) Single cup holder, single cup (7) Double cup holder, double cup, (8) Paper towel rack (9) Toilet brush bracket, toilet brush (10) Single-bar towel rack, double-bar towel rack (11) Single-layer rack (12) Multi-layer rack (13) Bath towel rack (14) Beauty Mirror(15)Hanging Mirror(16)Soap Dispenser(17)Hand Dryer
kitchen appliances
(1) Kitchen cabinet pull basket (2) Kitchen cabinet pendant (3) Sink, sink faucet (4) Scrubber (5) Range hood (Chinese style, European style) (6) Gas stove (7) Oven (electric, gas) (8) Water heater (electricity, gas) (9) Pipeline, natural gas, liquefaction tank (10) Gas heating stove (11) Dishwasher (12) Disinfection cabinet (13) Yuba (14) Exhaust fan (top type, window type, Wall type) (15) Water purifier (16) Skin dryer (17) Food residue processor (18) Rice cooker (19) Hand dryer (20) Refrigerator

Features:
100% brand new and high quality!
Ding dong doorbell switch s1 is push button switch on the door, without press the switch, the capacitance cannot be connected is not recharged, and capacitance voltage of 0 v, the reset has been in a low level condition, leading to the speaker doesn't work.When closed switch s1, the VCC current through the diode for capacitor charging, make its both ends of the voltage, and reset voltage also began to rise gradually.When the voltage of the capacitance increased to higher levels, namely the reset input port is the high level, the timer starts, composed of resistance, capacitance and diode oscillator start work, output frequency for f1
Restore low level is reset when the capacitor discharge end, timer stop working.
In the speaker output termination, output current will make the speaker voice.
Output frequency is not at the same time, the sound is different.
This circuit has two kinds of different frequency, so the speaker will be issued a "ding" "dong" two kinds of different sounds.

Specifications:
working voltage: 6V
PCB size: 3.9 * 3.5 cm
Color: black
Net weight: 30g

Package includes:
1 x Doorbell Suite Electronic Production DIY Kit