Circuit composed of CSJ-T300A/CSJ-R02A and microcontroller

Relevant key device information applied in this article: CSJ-T300A 7805 CSJ-R02A CSJ-T300A and CSJ-R02A are a pair of miniature ultra-long-range wireless remote control/data transmission components. CSJ-T300A is a transmitter component without coding, and the internal circuit It consists of a surface acoustic frequency stabilized oscillator, a buffer push stage, a high-frequency power amplifier and an amplitude keying (ASK) modulator. CSJ-R02A is a surface acoustic frequency stabilized superheterodyne receiving component. The core component of the internal circuit is RX3310A A single-chip superheterodyne receiving circuit, combined with a local oscillator stabilized by a surface acoustic wave resonator, works very stably and reliably. CSJ-T300A/CSJ-R02A can be combined with a microcontroller to form a data transmission circuit, as shown in the figure. The inductor connected in the picture is designed to suppress the interference of the microcontroller system on reception.