TO-92 BC547, BC557
+ SV -r
Q1, Q2 - dowolne tranzystory małej mocy
DB9 Connector
1 S
6 9
1 Data Carrier Detect
2 Receive Data (RxD)
3 Transmit Data (TxD)
4 Data Terminal Ready (DTR)
5 GND
6 Data Set Ready
7 Request To Send
8 Clear To Send
9 Ring Indicator