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±（5>b#<+3）
Protective cover
The RST 25 can be connected as following in the installation diagram:
TTL LEVEL TO RS232 LEVEL IC MAX232
High Speed Operation: tpd = 9 ns typ (CL = 50 pF)
Lm7909 Negative Voltage Regulator soldering flux ±（5>b#<+3）We all very well know regarding the building procedures a DC power supply circuit using a transformer, a bridge rectifier and a filter capacitor. It just requires connecting four diodes in a bridge configuration and connect it to the secondary of the transformer, the capacitor goes to the output of the bridge terminals. The output produced across the capacitor is approximately equal to the rated voltage of the transformer, rather a few volts higher