Receiver component SB-100ARX

Relevant key device information applied in this article: LM358 2SC9018 SB-100ARX is a super regenerative radio remote control receiving circuit, used in conjunction with SB-100ATX. The inside of this circuit is basically the same as the CS902, as shown in the figure. The circuit is assembled with small patch-type components. The first-level high-frequency amplifier tube and the first-level super-regenerative detector tube use 2SC9018 high-frequency transistors, and the integrated operational amplifier LM358 is used for two-level low-frequency amplification. The circuit does not contain a digital decoding circuit. When using a digital decoder, the PT2272 digital decoder used in conjunction with the PT2262 can be used. The characteristic of the SB-100ARX circuit is that the inductor coil L2 between the collector and the base of the super regenerative detector tube VT2 uses a molded coil, which has the characteristics of high sensitivity and stable operation. Its starting current can be lower than l00μA, and the circuit receiving frequency band reaches 5MHz. Due to the wide frequency band, the receiving circuit can be well matched with the simple transmitting circuit of LC oscillation type. The circuit receiving center frequency is 315MHz. The working voltage of SB-100ARX is 5V. In open areas, the remote control receiving distance is 80 to 150 meters.