Perfect Doorbell Suite Electronic DIY Kit Production Door Bell DIY Kit NE555 Chip TOP Suite Wholesale
Perfect Doorbell Suite Electronic DIY Kit Production Door Bell DIY Kit NE555 Chip TOP Suite Wholesale
SKU:012322
Regular price
$4.52
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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.When disconnecting switch s1, resistance and capacitance circuit, capacitor began to discharge.At the same time composed of resistance, capacitance and diode oscillator start work, output frequency for ` 2 f.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:
Package Name: NE555 doorbell kit
Working voltage: 4.0-7.0V
PCB size: 28mm (L) *25mm (W)
Kit horn: 8 Ohm 0.25W
Color: Beige
Net Weight: 15g
Package Includes:
1* 8 Ohm 0.25W horn
2* 100MM red line
2* 100MM black line
1* NE555 chip
1* 8P IC block
1* 100UF 25V Capacitance
1* 10UF 25V Capacitance
1* 6*6*5 keystroke]
3* 103 ceramic capacitors
5* 47K resistance
2* 1N4148
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.When disconnecting switch s1, resistance and capacitance circuit, capacitor began to discharge.At the same time composed of resistance, capacitance and diode oscillator start work, output frequency for ` 2 f.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:
Package Name: NE555 doorbell kit
Working voltage: 4.0-7.0V
PCB size: 28mm (L) *25mm (W)
Kit horn: 8 Ohm 0.25W
Color: Beige
Net Weight: 15g
Package Includes:
1* 8 Ohm 0.25W horn
2* 100MM red line
2* 100MM black line
1* NE555 chip
1* 8P IC block
1* 100UF 25V Capacitance
1* 10UF 25V Capacitance
1* 6*6*5 keystroke]
3* 103 ceramic capacitors
5* 47K resistance
2* 1N4148
Purchasing & Delivery
Before you make your purchase, it’s helpful to know the measurements of the area you plan to place the furniture. You should also measure any doorways and hallways through which the furniture will pass to get to its final destination.Picking up at the store
Shopify Shop requires that all products are properly inspected BEFORE you take it home to insure there are no surprises. Our team is happy to open all packages and will assist in the inspection process. We will then reseal packages for safe transport. We encourage all customers to bring furniture pads or blankets to protect the items during transport as well as rope or tie downs. Shopify Shop will not be responsible for damage that occurs after leaving the store or during transit. It is the purchaser’s responsibility to make sure the correct items are picked up and in good condition.Delivery
Customers are able to pick the next available delivery day that best fits their schedule. However, to route stops as efficiently as possible, Shopify Shop will provide the time frame. Customers will not be able to choose a time. You will be notified in advance of your scheduled time frame. Please make sure that a responsible adult (18 years or older) will be home at that time.In preparation for your delivery, please remove existing furniture, pictures, mirrors, accessories, etc. to prevent damages. Also insure that the area where you would like your furniture placed is clear of any old furniture and any other items that may obstruct the passageway of the delivery team. Shopify Shop will deliver, assemble, and set-up your new furniture purchase and remove all packing materials from your home. Our delivery crews are not permitted to move your existing furniture or other household items. Delivery personnel will attempt to deliver the purchased items in a safe and controlled manner but will not attempt to place furniture if they feel it will result in damage to the product or your home. Delivery personnel are unable to remove doors, hoist furniture or carry furniture up more than 3 flights of stairs. An elevator must be available for deliveries to the 4th floor and above.
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