Bro honestly you rock. Been YouTube chat.openai and googling and looking around and learning a lot. Get what your saying. So the(125s) are the 74VHC1G125 and your saying I need to build a Circuit using two 125 and toggle them (starting to follow)

I also found this forum hereLink to other forum
It’s been down inactive for about a year

they talk about using two 74hc244's not sure if they are the same family of chips lol

the talk about the same schematic from the white pages(SDi-12)


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magazine you rock thanks for having Paients with me .

The 74HC244 is an octal bus buffer with 2 common enables. You want a single part in a small package like a SOT-23. An advantage of usin the single parts is that if U1 requires a higher value of VCC you can easily do that.

 

So I believe I’m trying to make this

and I believe the image below is using one of the 125s and technical the black image is just one way and I need two 125s like you mention in #14 post
Just now able to see #17 image wasn’t loading before.

 

This should work

View attachment 284571

My only confusion and I can probly use Tx and rx but thought I was just using one pin on the esp32

I’m guessing I enable to txen pin(0,low) send the turn on tx turn off txen pin during that ns window and the data can go back and only can go to Rxd and my esp32 code reads that pin?

and not fully sure what the far left part is
I’m starting to feel dumb Because you gave me the answer and I’m now trying to underhow all the parts Fit. I see the 125s and get thst I believe.

 

The 74HC244 is an octal bus buffer with 2 common enables. You want a single part in a small package like a SOT-23. An advantage of usin the single parts is that if U1 requires a higher value of VCC you can easily do that.

This should work

View attachment 284571

where did u find/make this

 

where did u find/make this

I used the LTspice simulation package to whip up this schematic about 1.5 hours ago. Why do you ask?

 

My only confusion and I can probly use Tx and rx but thought I was just using one pin on the esp32

I’m guessing I enable to txen pin(0,low) send the turn on tx turn off txen pin during that ns window and the data can go back and only can go to Rxd and my esp32 code reads that pin?

and not fully sure what the far left part is
I’m starting to feel dumb Because you gave me the answer and I’m now trying to underhow all the parts Fit. I see the 125s and get thst I believe.

VCC and VSS represent the power supplies. The purpose is to provide a net, named VSS, which is at the same potential as GROUND. This is helpful in communicating power supply voltages to symbols which do not have explicit power and GROUND connections.

Monitoring the data that you send is a useful tool in debugging networked devices.

 

I used the LTspice simulation package to whip up this schematic about 1.5 hours ago. Why do you ask?

I just try too learn as much a I can bro. Really really appreciate your

 

Time knowledge and Patience I’m gonna order all his stuff and hopefully get some thing going I appreciate it you wouldn’t happen to know any online companies that just make this stuff with an order do you I’d rather have one or two that are like on a PCB other than a bread Bored

 

This should work

View attachment 284571

So this is pretty much sending 3.3v to the sensor and getting 3.6 back and stepping it down? I do see the 7.5v diode and the 3.3 Capacitor I’m just guessing there’s a little magic I’m missing