Search results

You probably could use them if you put strips along the wide dimension. A full sheet pan is usually just under 26x18" external dimensions so along the 18" (457mm) dimension you'd have too much sticking off the edge to keep those LEDs cool. Using the 26" dimension would work great, but then you'd...

@noodle-ledI thought I did but I agree Node-Red and Homeassistant together can make some really neat stuff like you said with auto watering based on soil condition. I've just never had good luck with the soil monitors lasting more than one harvest so I just settled on auto shut off of the...

I have two years ago's new hotness in my tent, a pair of Gen 7 Vero 29 COBs at 4000K some nice pin heatsinks from the ole Northern Grow Lights and the pricy AF Ledil reflectors. It lacks very much red but gets the job done. I took it down tonight to add a new feature to it so I grabbed some...

Oh man we're like birds of a feather. I also put an ESP8266 into my Alarm panel and dump the info into MQTT. Also thanks for posting the gif of the damper working, now I can see how you've got it all hooked up. I have to admit I watched it loop dozens of times, open... closed... open... closed...

This is a pretty cool setup. I use the "KMC WiFi Smart Plug Mini Outlet" (@ $10 each) with the Sonoff-Tasmota firmware in my tent with the added bonus that these have power monitoring as well. Do you have a little more information about your vent servos? I already have my fan temperature...

Exactly. I didn't include it in the post because it was already pretty information-dense, but I also did a test with a ceiling fan in my lab on low speed about 6-8ft away diagonally. Just a minor almost imperceptible airflow raised the Vf on the strips at 1400mA from 20.08V to 20.16V which we...

Yeah I designed the thermocouple circuit myself so I knew there was up to 3.3V on the wires, but I didn't think that the Tc points on the strips were in-circuit. I assumed they were just copper pads on the substrate isolated from the LEDs themselves. It does make sense because they would better...

I thought this was funny too. After I powered down the strip, the LEDs were actually being powered through the thermocouple datalogger. I'm really scratching my head as to how I didn't fry it if the Tc1 pad is actually connected to the circuit and I just pumped 1.4A @20V across it. Next time...

@nfhiggs yup, the steel soaks up the heat and spreads it out, but it's no substitute for aluminum when it comes to cooling. Still, it is more effective than just leaving them bare if a little cooling is needed and galvanized steel is already on hand. It is more conductive than the FR4 material...

In 2016 I saw a Hackaday post about someone building their own grow light and I got excited about the prospect. Literally 2 google searches later I ended up here and was given more information about every aspect of LED grow lights than I ever thought I needed to know. Thanks for steering me away...