JLCPCB Prototype for $2(Any Color): https://jlcpcb.com
My recently built PWM5 ThruHole stopped working. I'm pretty sure moisture got inside and interfered with the high-side driver circuit. So I've had to build another one 🙂
My recently built PWM5 ThruHole stopped working. I'm pretty sure moisture got inside and interfered with the high-side driver circuit. So I've had to build another one 🙂
temperature creep on the interfaces between the components and the glue allow for capillary action. Never allow any part of any component to protrude from the sealant.
Put the entire device into a small project case and then fill that case with epoxy so that every component is covered.
UV leds typically emit UVA light between 390-400nm. at 20mA, these LED typically emit 10mW of power. one would have to stare at this LED for over 20 hours at full brightness from 1m away to reach an exposure that would be considered to be harmful. then theres that fact that people tend to use these to cure nail gel at salons. youre more likely to experience damage from the sun than these LEDs. dont be silly, Julian
Hi Julian, just a quick question : are you still going to do a final version of the PWM5 and Femto controllers? I’m looking to build some and will hold off if you’re up revving them?
Why not just pot it in Epoxy Resin like ISOPON Clearcast Resin.
Julian,
Do you sell the solar charge controller pcb's, kits or assembled units? I am looking to have a 12v fan on the dehydrator on the garden and intend to have a 3s2p lion pack (or sealed lead acid if the LiPo is not suitable) that is trickle charged from a 10W panel using something like your controller.
Regards
Mike
Same as any flat roof: not if it leaks, but when it leaks
Now that is "surface mount" at it's best! Nice surgery, Julian!
Should you splay the transistors away from each other, so you can more easily get the glue between them? (You could push them back into place when you are confident you have full saturation). 🙂
How do all the other boards look? Seems as if the UV glue works, it just needs to be "perfect".
you probably make a daily walk through the garden to check the health of your solar charge controllers
you should vibrate the whole pcb to remove air and let the glue go to all nooks and cranny