The solar beacon reference design resistors R10-R14 are not available from the large web distributors. For instance, the 30M resistor is only available in 5% tolerance. Can you provide a source for these resistors please?

[Fred Eady]

Difficult to obtain the high-ohmage resistors in the solar beacon reference design. Will 5% resistors suffice or do the resistors have to be 1% tolerance.

[RK]

Haven't seen the reference design, however Digikey has 12 different 50M 1% resistors listed, and that was just the first place I tried. Arrow has some too. They are however incredibly expensive so hopefully someone from Nordic will reply and say that 5% is fine.

[Fred Eady]

Hi, RK Respectfully, I think you meant 30M instead of 50M.. There are no 30M 1% 0402 packaged resistors anywhere I have searched. Like you, I'm interested in what the folks at Nordic suggest. Thanks for the interest, RK.

[RK]

Sorry I think my eyesight is going! I read 50M for some reason, multiple times. And this is supposed to be 0402? I have to agree those don't exist. Smallest I can find readily available are 2010s

[TORS]

I believe 30M 5% tolerance would be fine. The only difference between 1 and 5% tolerance will be that the actual turn on/off voltage levels might be changed somewhat because of the inaccuracy of the resistor value. Another approach could be to combine two low tolerance resistors.

[Fred Eady]

Thank you, TORS. I appreciate your interest and the time you took to provide an answer. I'm using the Nordic-supplied Gerber. So, combining the resistors will take some "artwork" :-) My FAE suggested getting a bag of 5% resistors and culling out the 1%-ers. So, far it looks like I'll have to make an attempt with the 5% parts and see if it all works out. Thanks again, TORS.