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Lessons on how to use UltimaSerial
Serial Device
DI-150 front-end circuit and component placement
DI-151 front-end circuit
DI-194 front-end circuit and component placement (older version)
QuickBASIC sample for DI-190, DI-194
To connect external power to the latest version of DI-194 (refer to the circuit)
Make sure your DI-194 is not a simple rectangle shape, otherwise it is an older version of DI-194 and the following does not apply.
1) Remove R24 (100 Ohms)
2) Install diode D6
3) Install R25, the following value should be OK:
If it is between 10V to 15V, R25=1KOhms
If the voltage of the external power supply is less than 10V, R25 =330Ohms
4) Apply the external power to DI-194 via Dig 0
No need to do anything with Q3 and JP3
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Last update: 07/15/07
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