RollOn automatic curtain

thingiverse

This appears to be a project documentation for an Arduino-based roll-on inverter. Here's a breakdown of what's being described: **Components:** * ATtiny85 microcontroller * Mosfet (or relay) module * Light-dependent resistor (LDR) * Battery pack (initially LiOn, later changed to 4x AA batteries or NiCd cells with solar charger) **Circuit Description:** The circuit consists of an ATtiny85 microcontroller connected to a mosfet module and an LDR. The system is powered by a battery pack. **Functionality:** The roll-on inverter can be controlled using the "UP" and "DOWN" buttons, which are located under the logo on the box. When activated, the system uses a step-up boost circuit (XL6009) to increase the voltage from the battery pack to power a motor. The LDR is used to monitor the light level and adjust the inverter's operation accordingly. **Updates:** Several updates have been made to the project: 1. November 4, 2016: * Added RollOn_V2.ino (Arduino code) and RollOn_V2.fzz (Fritzing schematic file) * Changed battery pack from LiOn to 4x AA batteries * Added step-up boost circuit for better motor stroke and faster response 2. November 8, 2016: * Modified the inverter to function only when needed (≈50mA economy) by enabling its EN pin based on Digispark's LED pin 3. November 10, 2016: * Added option to use NiCd cells instead of alcaline batteries and solar charger for longer periods **External Components:** The project uses several external components, including: 1. Mosfet (or relay) module (IRFP250 or IRFZ44N) 2. LDR (GL5516) 3. Battery pack (4x AA batteries or NiCd cells with solar charger) **Software:** The RollOn_V2.ino file is the Arduino code for the project. **Design Files:** The project includes a Fritzing schematic file (RollOn_V2.fzz) and an STL file for 3D printing.