User's Manual

APPENDIX B
36
Demonstration Circuit
Appendix B: Demonstration Circuit
The Micro-reader module can be demonstrated using the circuit shown in Figure 17.
Figure 17: Micro-reader Demonstration Circuit
L78M05CV
24 22 19 16
ANTENNA
MICROREADER
+
+
+
6
15
14
13
+
12
11
16
2
1
3
4
5
+
RS 232C
+5V
0.1 µF
10 µF
25V
10 µF
25V
10 µF
25V
10 µF
25V
10 µF
25V
10 µF
25V
240
Ω
240
Ω
240
Ω
SYNC
STAT
OKT
5
6
29
30
1
21
15
25
2
26
27
10K
10K 10K
RDEN
CRDM
WLSC
MAX232
3 2 5
0V
+ DC IN
- DC IN
NB: For design-in we recommend the SIPEX SP232 for the
line driver chip to avoid potential interference problems
+
0V