Jump to content

5v Circuit design help for remote receiver.

Recommended Posts

I've been trying to wire up a remote system for my raspberry pi with a 5v 315mhz receiver, and planning to use the Pi's 3.3V high to close the circuit with an BJT NPN. What's confusing me is the step down from 5v to 3v3 after the momentary switch has been enabled; Pi's input takes 3v3 max as a pull up; I'm not very savvy with resistances; could someone offer me up their help?


Voltage outputs: the Pi has a 5v rail pin, max 16mA and a 3v3 pin

Grounds: the Pi has various ground pins

Inputs: the Pi has various pins rated  3v3 to detect signal highs and lows

Components: The momentary receiver board has a 5v in, ground, and 4 outs (D0, D1, D2, D3, each corresponding to what remote button is pressed), I'm assuming these will also be 5v. I want to connect these outs to the 3v3 pin, but I don't want to exceed the 3v3 pin max. 


I plan to step down the voltage with a series divider, but I'm not sure if the receiver chip is its own "circuit" or not. The image on the left assumes the 5v in and 5v out are on different phases, the one on the right is a singular circuit but the 5v in has been stepped down to 2.5, which won't fly to run the receiver circuit. Any thoughts would be extremely appreciated!





Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...