Get 5V from 9V Battery for TTL 7400 IC

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SUMMARY

The discussion focuses on powering a TTL 7400 IC, which requires a +5V Vcc, using a 9V battery. A variable resistor is not an effective solution for this application, especially under varying current demands. Instead, the recommended approach is to utilize a linear voltage regulator, specifically the LM7805, which is widely available from manufacturers such as National Semiconductor, Texas Instruments, and On Semiconductor. This method ensures a stable and reliable +5V output for the TTL 7400 IC.

PREREQUISITES
  • Understanding of TTL 7400 IC specifications
  • Knowledge of linear voltage regulators, specifically LM7805
  • Basic electronics concepts, including voltage and current relationships
  • Familiarity with battery power sources and their characteristics
NEXT STEPS
  • Research the specifications and applications of the LM7805 voltage regulator
  • Learn about alternative voltage regulation methods, such as switching regulators
  • Explore circuit design for powering TTL ICs from battery sources
  • Investigate current draw considerations for TTL 7400 ICs in practical applications
USEFUL FOR

Electronics hobbyists, circuit designers, and engineers working with TTL logic circuits who need to power ICs efficiently from battery sources.

muh_j18
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hi,
I'm working on a project where I'm using a ttl 7400 ic which need +5v Vcc, how can i use 5v from a battery 9v, variable resistor works?
thanks
 
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muh_j18 said:
hi,
I'm working on a project where I'm using a ttl 7400 ic which need +5v Vcc, how can i use 5v from a battery 9v, variable resistor works?
thanks

That really doesn't work too well if you're drawing a lot of current, or something that has a lot of variable current draw. It's a lot easier to use a linear voltage regulator, something like an LM7805 (lots of companies make these--National Semiconductor, Texas Instruments, On Semiconductor, etc. etc.) They're cheap and pretty reliable.
 

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