Dec 14th 2017
Know How... 360
Networking Rock n' Roll!
- The "Plenum Space" is non-sealed space in a building. (The space between a roof and a drop-ceiling, or the floor and a raised floor)
- We like to use those spaces for running cables. (Out of sight, away from power, good access to the entire structure)
- 4 pairs of unshielded-twisted-pair.
- Can do 1Gig Ethernet for 100 Meters.
- SUPER EASY TO TERMINATE.
- For networking, it uses the same 24 AWG UTP configuration. BUT... the jacket is a specially-formulated low-smoke, fire-retardant material. In case of short or fire, the jacket will melt around the short, but no lasting fire, and little smoke.
- Copper for 1Gig
- Fiber for 10Gig
- But FAR more important... conduit. Conduit makes EVERYTHING BETTER!
Can you inSPIRE me?
- ~5 Watt/Hours
- Each Cell can provide (3800 x 3.7 = ) ~14 Watt/Hours
- We have ~42 Watt/Hours of capacity
- But we don't run down all the way... 30% is when the protection circuit will kick in.
- So we should count on 29 Watt-hours of USABLE power
- 29 / 5 = Just under 6 hours AT FULL POWER
- Shutting down WiFi/Bluetooth and not pegging 100% power should give us close to 8 hours.
"Hi Robert, I just watched the show where you mentioned you'll be leaving next year. Just wanted to send you something as a token of my appreciation for all I've learned from Know How. From 3D printers to quadcopters to Arduinos and Raspberry Pi's while I've mostly just futzed around with them, I've been able to use them to turn my son onto engineering and electronics at an early age, which has undoubtedly broadened his horizons (he's always talking about wanting to make robots when he grows up!).
Anyway, I made a few of these cases for raspberry Pi Zeros on my CNC mill and I thought it'd make carrying one on your travels a little easier. This is for the 1.3 version, though it'll fit a W too, just not sure how much wireless strenght will be degraded. Not that it really needs it, but a little heat past between the CPU and the little pad in the top should help dissipate heat through the case.
Anyway, thanks again for sharing your knowledge!" -- Chris and (His Son) Vlad
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