A user asks for pre-made handheld device platforms combining a microcontroller, screen, enclosure, and battery that can be programmed immediately without hardware assembly. They seek ready-to-use solutions to focus on software development rather than hardware engineering.
A hobbyist built an automatic plant watering system using an Arduino Nano, capacitive moisture sensor, and aquarium pump controlled by a MOSFET-based circuit. The system reads soil moisture values and triggers the pump to dispense 100ml of water when soil dries below a threshold, with a one-hour lockout to prevent overwatering.
A 7.5-inch monochrome e-ink display with 800x480 resolution, SPI interface, and Arduino compatibility. Designed for low-power applications like e-readers and wearables, priced at $34.50 for orders of 10 or more units.