Logic Level Converter 5V <---> 12V

Other Miscellaneous
1

Hello,

I am going to have a project which needs to convert signal (4800bps) between 5v and 12V. I see that there is a breakout board for 3.3v <—> 5v but not for 5v<—>12v. Does Sparkfun have a breakout board for signal conversion between 5V and 12V?

Thank you.

2

Are you converting TTL serial to RS-232 serial? If so, the [MAX3232 will do what you’re looking for.](SparkFun Transceiver Breakout - MAX3232 - BOB-11189 - SparkFun Electronics)

3

No. As described in my post and the title, what I need is 5v<–>12v (or more precisely, 0/5v <—> 0/12v), not TTL to/from RS-232 (which is 0/5v<–> -12/+12v).

4

EddyL:
No. As described in my post and the title, what I need is 5v<–>12v (or more precisely, 0/5v <—> 0/12v), not TTL to/from RS-232 (which is 0/5v<–> -12/+12v).

Or to be exact, MAX3232 inverts and shifts logic level between 0v/5v <—> -6v/+6v (or -12v/+12v) as what my MAX3232 showed me in my another project. This is not what I need here.

If there is no readily made Sparkfund board which can do the 0v-5v<—>0v-12v conversion, I will appreciate it if anyone can give me some suggestion how I can get the same result. I understand that a simple transistor/resistor circuit should be able to do this conversion but I do not have the ability to design one.

5

Checkout Philips AN97055; that configuration should work for any voltages as long as the mosfets can tolerate the higher voltages and can operate at the lowest ones.

You can then also look at https://www.sparkfun.com/products/12009 which should do what you want.

6

Thanks a lot for the repy and information. I have just placed an order for the “SparkFun Logic Level Converter - Bi-Directional” and will give it a try for 5v<—>12v conversion.

7

languer:
Checkout Philips AN97055; that configuration should work for any voltages as long as the mosfets can tolerate the higher voltages and can operate at the lowest ones.

You can then also look at https://www.sparkfun.com/products/12009 which should do what you want.

It works. Thanks again for the information.

8

A little late here; but I’m glad it worked. And thanks for coming back and letting the community know it worked; perhaps it will also help someone with a similar need in the future.