Over-temperature wireless alarm circuit

Relevant key device information applied in this article: LM741 8050 FDD5 KD9562 Relying on modern electronic technology, it is a very common thing to provide a set of constant temperature control devices for some equipment working under high temperature conditions. However, in very rare and special circumstances, when the control device fails and the control function fails, if an over-temperature alarm device is installed, another set of safety guarantees can be provided for these devices. The over-temperature automatic radio alarm device is such a device. When the equipment exceeds the operating temperature, it can automatically send out an over-temperature alarm signal to notify the personnel on duty to take measures. The circuit consists of a temperature monitoring circuit, a radio transmitting circuit and a radio receiving alarm circuit (not shown), as shown in the figure. The function of the temperature monitoring circuit is to turn on the working power of the radio transmitting circuit when the temperature exceeds the set temperature standard, causing the transmitting circuit to send out an alarm signal.