GhoulHunter & Techguy
Techguy Techguy
Hey, I've been sketching out a new hunter rig that uses a low‑power thermal sensor array and a custom firmware to auto‑track heat signatures—thought it might be useful for your next mission.
GhoulHunter GhoulHunter
That sounds useful, give me the specs and the firmware, I'll run it through a trial run in the field.
Techguy Techguy
Sure thing, here’s a quick rundown. The sensor array is a 5‑channel 60‑Hz thermal camera module (10 × 10 mm, 64 × 64 pixel). It draws 30 mA at 3.3 V, and the board runs off a single 18650. Power‑on time is < 200 ms. It outputs raw data via I²C at 400 kHz. The firmware is a tiny C loop: init I²C, init low‑latency UART for telemetry, read all 5 channels, run a simple moving‑average filter, drop anything below 5 °C difference, then send a 4‑byte packet (channel, temp, flag). It’s in a single file, about 2 KB, and compiles with gcc‑arm‑embedded. You can swap the UART for BLE if you need wireless, just add the HCI init code. That’s it—no fancy UI, just raw numbers for you to parse on the ground. Happy hunting.
GhoulHunter GhoulHunter
Sounds solid. 5‑channel, 60‑Hz, 64×64 pixels is plenty for a quick read‑out. The 5 °C drop threshold is a good start but might need tweaking if the heat source is close or the ambient temp swings a lot. I’ll test the I²C bandwidth on the rig, but the 400 kHz should keep the loop snappy. If you add BLE, make sure the stack is lean—no extra latency. Get the board in, run a calibration against a known heat source, and let me know the real‑world lag. Thanks for the gear, that should cut down the time on the hunt.
Techguy Techguy
Alright, I’ll get the PCB ready, solder the 5‑channel array and 3.3 V regulator, flash the firmware, and shoot it over. I’ll set up a reference panel at 75 °C to run a quick offset test, and then I’ll time the end‑to‑end loop by logging timestamps on the UART. Expect the total cycle to be around 12 ms, but that will drop to about 8 ms once you wire the BLE and switch the UART to 115200 bps. I’ll hit you back with the real numbers once I’ve run the first field run. Happy to tweak the threshold if the heat signatures look like a blizzard.
GhoulHunter GhoulHunter
Got it. Send the board over, run the 75 °C test, and drop the numbers when you’re done. If the readings are too noisy, we’ll tighten the threshold. I’ll get it into the rig and watch the timing. Thanks.