Review on 🌡️ KNACRO DC 24V Green Digital Temperature Control -4℉ to +212℉: Precision Controller & Switches by Ivan Gee

The Knacro DC is an amazing little device at an incredible price. I needed a 5V programmable temperature controller for a mobile heater that runs on a USB power supply. After much searching I could only find this 5V that was actually driven. I will list them here: To program: Press Set for 5 seconds - Then + or - to select P0 -> P4, then press Set on selected P and +/- to select setting and set, to select P0 - H for heating C for cooling function P ! - (0 - 20) hysteresis (temperature change prevents fast switching on/off) P2 - (-10 -+10) Temperature sensor calibration - my sensor was off by 2 degrees so this is a great feature for critical situations P3 (0 - 240) - Delay timer "ON". I think in minutes? I chose "OFF" P4 (1 - 240) - Timer "OFF" - Thinking? not used Another small minus - if the case was available I would buy it. Cases are available for other similar brands - might they fit? Please note when using USB power supplies through this device: If the heating or cooling unit you are connecting is switched off via the temperature controller, this device itself will not consume enough power. to keep your power supply on - i.e. power supplies are programmed to turn off when the device is deemed to be charged and thus stop drawing a given current. To solve this problem I added a 5V lightbulb between the power supply and this device (not at the relay) and that solved the problem perfectly! All this, as they say, works great!