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Author Topic: Do I have this right?  (Read 623 times)

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Offline unicoderTopic starter

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Do I have this right?
« on: May 09, 2009, 01:29:38 PM »
Ok so hodge podging something Like the Max232 IC together.

Datasheet for CD4049UBE
Given:
RS232E

H = -3v/-12v
L = +3v/+12v
TTL

H = +2v/+5v
L = 0v/+0.8v

CD4049UBE Pin 1 -> +5v
CD4049UBE Pin 8 -> +0v

Sends -V to CD4049UBE when RS232 Low is on DB9 Pin 3
DB9-Pin 3 -> PNP(Q1) Base
PNP(Q1) Emitter -> CD4049UBE Pin 3
PNP(Q1) Collector -> 0v

For AVR's
CD4049UBE Pin 2 -> MCU Pin 2(PD0)
MCU Pin 3(PD1) -> CD4049UBE Pin 4
CD4049UBE Pin 5 -> DB9 Pin 2

For 8051's
CD4049UBE Pin 2 -> MCU Pin 3.0
MCU Pin 3.1 -> CD4049UBE Pin 4
CD4049UBE Pin 5 -> DB9 Pin 2
Industrial Electrician / Maintenance / Motor Controls / PLC's : 3572 hours logged.
C++, C#, MASM32 profficient. Experienced (5 years) DirectX / HLSL / General Graphics and IK programmer.

 


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