LowPowerLab Forum

Hardware support => General topics => Topic started by: noch on October 10, 2016, 10:44:45 AM

Title: Any suggestions on an inline fuse for Lipo powered Mote
Post by: noch on October 10, 2016, 10:44:45 AM
Hello,

I finished up my first Mote last night and will be powering it using a 1s lipo.  My external circuit is on a proto board and that just makes me nervous as I don't want to ironically burn the house down while creating gadgets to let me know if I am burning the house down...

I believe something like what is pictured below would do the trick but I can't seem to fine them anywhere, only the larger inline fuses. 

Any suggestions?

(https://www.nexternal.com/mgt/images/MIRRORTAP%20INFO%20WITH%20LOGOS.gif)
Title: Re: Any suggestions on an inline fuse for Lipo powered Mote
Post by: luisr320 on October 10, 2016, 01:12:02 PM
How about these:
http://www.littelfuse.com/products/fuses/axial-radial-thru-hole-fuses/micro-tr3-fuses.aspx (http://www.littelfuse.com/products/fuses/axial-radial-thru-hole-fuses/micro-tr3-fuses.aspx)

Or these:
http://spiratronics.com/electrical-and-power/fuses-and-holders/micro-axial-fuses.html (http://spiratronics.com/electrical-and-power/fuses-and-holders/micro-axial-fuses.html) (6.8mm)
Title: Re: Any suggestions on an inline fuse for Lipo powered Mote
Post by: noch on October 10, 2016, 02:39:58 PM
Ah, perfect.  I was having a difficult time finding them, thanks! 

Any suggestions on what amperage fuse to get?  My project is all fairly low power: Moteino with RFM69HW, cheap PIR sensor, and a TSL2561 breakout (.6mA max).

Looks like the PICO fuses come in: 0.062, 0.125, 0.2, 0.25, 0.375, 0.5, 0.75, 1, 2A

Thanks.
Title: Re: Any suggestions on an inline fuse for Lipo powered Mote
Post by: steve v on October 10, 2016, 10:31:54 PM
A 0.25 Amp fuse should be fine. This will enable you to transmit continuously. With a 150ma transmitter and have no issues.

The  0.25Amps at 3.3 V  would require some sensitive  Kindling to start a flame.
Title: Re: Any suggestions on an inline fuse for Lipo powered Mote
Post by: perky on October 11, 2016, 06:29:28 AM
You could look at polyfuse (self resetting) fuses for this.
Mark.