Ht12e/d input output logic question

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SUMMARY

The discussion centers on troubleshooting an RF circuit utilizing an L293D motor driver chip, where the user is experiencing issues with high/low signals after soldering. The user mistakenly connected the positive leads from the 2p2t switches to a 9V rail instead of a 5V regulator, raising concerns about the impact on the encoder's performance. The consensus is that voltage levels sent to the encoder data pins can significantly affect the signal transmitted to the decoder and subsequently to the motor driver chip. Detailed information about part numbers, circuit schematics, and voltage levels is essential for effective troubleshooting.

PREREQUISITES
  • Understanding of RF circuit design
  • Familiarity with L293D motor driver chip functionality
  • Knowledge of encoder/decoder operation
  • Basic soldering skills and circuit troubleshooting
NEXT STEPS
  • Research the specifications and operating voltage ranges for the encoder and decoder used in the circuit
  • Learn about proper wiring techniques for RF circuits
  • Study the impact of voltage levels on digital signal integrity
  • Examine circuit schematic design best practices for motor control applications
USEFUL FOR

Electronics enthusiasts, hobbyists working on RF circuits, engineers involved in motor control systems, and anyone troubleshooting encoder/decoder signal issues.

vavapg
Good day.
I'm currently in the soldering phase of an RF circuit designed to operate an L293D motor chip. On the breadboard I managed to get it to work, but after soldering (and checking for shorts) I am not getting proper high/low signals sent through the encoder/decoder from 2 2p2t switches to the motor driver chip. The only variable I can think of is that in soldering, I put the positive leads from the switches to the 9v rail instead of the 5v regulator chip like I did on the breadboard. The data sheet says this is still within operating range for the encoder. Would a difference in voltage sent to the encoder data pins effect the transmitter signal to the decoder and out to the motor chip? As far as I know, they just operate on logic high/low signal.
Thanks for any help.
 
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Since your problem relates to an encoder/decoder and switch, part numbers on those are needed, along with a circuit schematic of both the intended wiring and what the possibly bad wiring was. Also what voltage levels do you get and what other devices are to those points? Without this information we are operating on zero information regarding what is desired and what is actually happening.
 
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vavapg said:
I am not getting proper high/low signals

What do you get? Nothing? The Local radio station :-)
 

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