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Powering the Simple RF M4 Receiver
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Powering the Simple RF M4 Receiver

by SiBrasso on Wed Jun 12, 2019 10:40 am

Hi

I purchased a Simple RF M4 Receiver and when I hooked this up to my Arduino which puts out 5v it works great with good range. Form my project however I wanted to use a nao board which only puts out 3v and with that the range sucks (I know it is 5v+ so no surprise here).
To combat this issue I purchased a variable voltage USB power supply. One of these:
https://www.amazon.co.uk/gp/product/B07 ... UTF8&psc=1

When I connect this to the RF M4 all of the output pins, D0-D3, fluctuate from low to high continuously. I plug it back into my Arduino and it works fine again. I have the Volts on the power supply set to 5 and have checked this with my multi meter and is reasonably accurate.

Can any one help?

Many thanks

Si

SiBrasso
 
Posts: 1
Joined: Wed Jun 12, 2019 10:29 am

Re: Powering the Simple RF M4 Receiver

by adafruit_support_bill on Wed Jun 12, 2019 10:58 am

Boost converters work by rapidly switching DC current pulses into an inductor. The resulting voltage spikes are filtered and regulated to produce the boosted output.

Most boost converters have some residual switching noise. Given the absence of any large filter capacitors in the photo, I'd expect that one has quite a bit of noise on the output. You can try adding some filtering of your own by wiring a capacitor or two between 5v and GND on the output. Make sure the capacitor is rated for at least 5v.

adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Please be positive and constructive with your questions and comments.