Astroheat is a 12 V / 10 A smart power and dew‑control system for astrophotography. Built around the ESP32 and designed for outdoor operation under a protective cover, it keeps your equipment ready to image in seconds.
| Main power input | XT60 connector — 12 V DC, 10 A max (fused) |
| Heater channels | 4 × RCA jacks, 12 V / 2.5 A max each, MOSFET‑controlled |
| Adjustable DC output | 1 × LM2596 buck converter, 3–12 V / 2 A adjustable |
| Auxiliary 12 V output | 1 × barrel jack (5.5 mm / 2.1 mm), 2 A max |
| Total continuous load | Up to 10 A (main fuse limited) |
| Power efficiency | < 0.3 W idle consumption |
| Protections | Reverse‑polarity diode, 10 A automotive fuse, short‑circuit and thermal safeguards on outputs |
| Temperature inputs | 4 × 2.5 mm 4‑pole jacks (one per heater channel) |
| Ambient sensor | 1 × 2.5 mm 4‑pole jack for humidity/temperature |
| Supported sensors | DS18B20 (1‑Wire) and AM2301/DHT22 (ambient humidity/temperature) |
| Auto‑detection | Firmware detects connected sensors and shows live data in the app |
| Microcontroller | ESP32 (dual‑core 240 MHz, 4 MB Flash) |
| Wireless | Wi‑Fi 802.11 b/g/n, 2.4 GHz — AP or Station mode |
| Control app | Blynk IoT (Android / iOS) + web dashboard |
| Updates | Browser‑based flashing via Flash Astroheat (ESP Web Tools) |
| Integrations | MQTT‑ready architecture for future automations |
| Per‑channel control | PID‑based regulation; manual power sliders in app |
| Dew‑point logic | Heater activation based on dew‑point margin (ΔT > 3 °C rule) |
| Fail‑safes | Auto shutdown on sensor disconnect or internal over‑temperature |
| Over‑current | Main 10 A automotive fuse |
| Reverse polarity | Series Schottky diode on input |
| ESD protection | TVS diodes on sensor inputs |
| Outdoor use | Intended to stay outside under a protective cover (“poor‑man’s dome”) |
| Enclosure | Black anodized aluminum |
| Dimensions | ~ 120 × 90 × 40 mm (incl. connectors) — to be confirmed |
| Weight | ≈ 250 g — to be confirmed |
| Mounting | Velcro pad or dovetail clamp |
| Connectors | XT60 (input), 4 × RCA (heaters), 4 × 2.5 mm jacks (temp), 1 × 2.5 mm jack (ambient), barrel outputs |