SPIET800 | ABB| Transistor conduction module

Description

SPIET800 | ABB| Transistor conduction module

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When there is a signal input at input terminal SPIET800 , the base of transistor Q7 generates current, and the transistor conducts. At+5V voltage, the buzzer operates; When there is no signal input at input terminal P1.0, the Q7 base has no current, the transistor is cut off, and the buzzer stops working.

The SPIET800  transmission circuit can use ready-made DTMF chips here, but if a specialized chip is used, additional circuits need to be added, which increases the cost again. Given that there are four 16 bit timing/counters inside C8051F340, this internal resource can be utilized to achieve DTMF communication using pulse width modulation PWM.
The home gateway is the core component of embedded smart home systems, and the designed wireless transceiver module circuit is a part of the home gateway. The principle and design method of a wireless transceiver module circuit composed of a single RF transceiver chip nRF0433. The designed wireless transceiver module circuit operates in the 433MHz ISM frequency band, with a data rate of 9600bit/s, a high sensitivity of -105dBm, a maximum transmission power of 10mW, a power supply voltage of 215-515V, and a working current of 31-47mA.

Mailbox：sauldcsplc@gmail.com |ABB SPIET800
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