74hc Buffers & Line Drivers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 74hc Buffers & Line Drivers. The LED consumes little current so is not an issue. However a relay usually consumes more current and has a back-emf pulse when it is. If you intend to run the LED from the same supply as the logic gate, and that gate can source and sink symmetrically, then it doesn’t matter.
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74hc540 am using a set of 8 relays. 74hc540 was just wondering if there’s a good engineering not logistical reason for choosing one over the other, when you can go both ways.
Sign up using Facebook. So when 74hc540 am active high, the led turns on.
Alexios 6 Does it make any difference?
This means you want a inversion in there for a logic high to cause 74hc540 LED to light. As long as you are not violating any 74hc540 in the datasheet, go ahead 74hc540 wire up the LED whatever way is most convenient for you.
buffer – Driving LEDs with 74HC or 74HC? – Electrical Engineering Stack Exchange
What are 74hc540 differences between 74hc540 74HC that you can read out of the datasheet? Sign up 74hc540 Email and Password. This is why people are used to wiring LEDs between the output and Vdd. Post as a guest Name.
You could let the final board routing decide. Questions Tags 74hc540 Badges Unanswered. Thanks for the 74hc540. Do they 74hc540 for your purpose? Wouldn’t it be an option to invert the 74hc540 already in your software? Of course if this is all 74hc540 from a microcontroller, which it almost always is these days, then digital signal polarity is irrelevant since it can be handled in the firmware either way. Means to actively drive the pin for the inactive state 7hc540 of using a separate inverter?
I see that I can control a relay from an 74hc540. But in this question 74hc540 are suggesting to use a 74HC I dont understand what this means.
G – 74HC Octal Buffer and Line Driver
74c540 However a relay usually consumes more current 74hc540 has a back-emf pulse when it is switched OFF. So i 74hc540 thinking of using an inverter.
As Humpawumpa says, invert the logic in your code. Sparky 8, 74hc540 12 Sign up or log in Sign up using Google. Sign up using Facebook. Thanks, that answers my question.