Wireless RS 232 Link
Using licence-exempt Short Range Devices (SRDs)
Materials
Gerber file
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Component list
R1-R4 = 1kOhm8
Capacitors:
C1,C3,C9 = 100nF
C2,C4 = 10µF 16V radial
C5-C8 = 1µF 16V radial
Semiconductors:
D1 = 1N4148
D2,D3,D5 = LED, green, 3mm, low current
D4 = LED, red, 3mm, low current
IC1 = 7805CP
IC2 = MAX232CP
IC3 = ER400TRS from LPRS (see text)
Miscellaneous:
JP1 = jumper with 2-way pinheader
JP2 = jumper with 3-way pinheader
K1,K3 = 2-way pinheader
K2 = 9-way sub-D socket (female), angled pins, PCB mount
K4 = BNC socket, 50Ohm, PCB mount (Farnell # 365-0558)
RS232 cable (non crossing)
PCB, order code 030204-1
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