Delayed voice anti-theft alarm circuit
Source: InternetPublisher:containsmachine Keywords: Anti-theft alarm alarm circuit BSP LED Updated: 2021/04/07
Circuit working principle: This circuit consists of three parts: monostable trigger circuit, voice alarm generating circuit
and audio power amplifier circuit. The monostable trigger is composed of IC1 (NE555)
. Normally, the permanent magnet ZT is close to the reed switch AG. At this time,
the reed in AG is connected, causing pin 2 of lC1 to be in a high level state, and pin 3 of lC1 to output a low level
, so the alarm indicator LED does not light up. Subsequent circuits also don't work.
Latest Industry Application Circuits
- Method for converting a spark ignition system to an enhanced sequential spark ignition system for a 6-cylinder engine
- What components and functions does the battery management system consist of?
- How to build a self-driving drone
- Telephone line protection alarm circuit
- One control two constant pressure water supply frequency conversion speed control circuit b
- Computer host overheating alarm circuit
- Music calendar using SMC6S37
- Smoke alarm circuit (1)
- Infrared light controlled toy tank circuit
- Wired centralized control circuit that directly starts the water pump motor
Popular Circuits
- Farmland irrigation automatic control circuit b
- Junction field effect transistor mixer circuit
- collector amplitude modulation circuit
- Wien bridge oscillator circuit
- Capacitive feedback oscillator circuit
- Multi-frequency resonant high-frequency power amplifier circuit for transmitter stage
- Common emitter-common base wideband amplifier circuit composed of F733 integrated amplifier
- Second-order active band-stop filter circuit
- superheterodyne radio circuit
- Home appliance repair signal generator circuit
京公网安备 11010802033920号