Tecnicenter
DIVERSOS => Eletrónica Geral => Projectos e circuitos electrónicos => Tópico iniciado por: mixmix em Maio 18, 2013, 09:17:07 pm
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Conversor RS232 - RS485 com controlo RX - TX automatico
(http://s.eeweb.com/members/circuit_projects/projects/2012/01/10/RS232-RS485-Converter-Final-1326214078.jpg)
R1, R2 : 1K 1/4W Resistor
R3, R4, R5, R11 : 2.2K 1/4W Resistor
R6, R7 : 560 Ohm 1/4W Resistor
R8, R9 : 47 Ohm 1/4W Resistor
R10 : 120 Ohm Resistor
C1 : 10uF 50V Electrolytic Capacitor
C2, C4 : 100n Polyester Capacitor
C3 : 10uF 16V Electrolytic Capacitor
C5, C6, C7, C8 : 1uF 16V Electrolytic Capacitor
D1 : 1N4007 Diode
L1, L2 : Red and Green LEDs
Q1 : BC327 PNP Transistor
U1 : MAX232N
U2 : MAX485CPA
U3 : LM7805
J1 : DB9 PC Mount Female Connector
U4, U5 : 2 Terminal PCB Terminal Block
O esquema e a maquete para fazer o PCB podem descarregar em anexo
:aqui: