Product details of OH Perfect Doorbell Electronic DIY Kit for Home Security 6V PCB 3.9x 3.5 cm
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 isnot recharged, and capacitance voltage of 0 v, the reset has beenin a low level condition, leading to the speaker doesn't work.Whenclosed switch s1, the VCC current through the diode for capacitorcharging, make its both ends of the voltage, and reset voltage alsobegan to rise gradually.When the voltage of the capacitanceincreased to higher levels, namely the reset input port is the highlevel, the timer starts, composed of resistance, capacitance anddiode oscillator start work, output frequency for f1
Restore low level is reset when the capacitor discharge end, timerstop working.
In the speaker output termination, output current will make thespeaker voice.
Output frequency is not at the same time, the sound isdifferent.
This circuit has two kinds of different frequency, so the speakerwill 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
Specifications of OH Perfect Doorbell Electronic DIY Kit for Home Security 6V PCB 3.9x 3.5 cm
- 1 x Doorbell Suite Electronic Production DIYKit
General Features: | SKU | NO037OTAA403AJANMY-7942980 |
| Warranty period | No Warranty |
| Warranty type | - |