Blog Archives

HydroBot: Nutrient Film Technique

Continuous Flow or Nutrient Film Technique (NFT) hydroponic systems use a shallow stream (or film) of water recirculating through a channel to deliver nutrients directly to the plant roots. The stream is shallow enough that the uppermost roots laying in

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Posted in HydroBot, Projects

HydroBot: Hydroponics Overview

What is Hydroponics? Hydroponics is a method of growing plants without soil, using mineral nutrient solutions dissolved in water. Plants use light to turn water and carbon dioxide into the food they need, through a process called photosynthesis. As long

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Posted in HydroBot

HydroBot: Prototyping New Modules

ProtoModule is a HydroBot module designed to easily develop and test new monitoring or control functions that may someday go into a HydroBot module. It has 11 GPIO pins and the power rails broken out on a 0.1” pin header for easy breadboarding or

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Posted in HydroBot, Projects

HydroBot: Connecting the Modules

HydroHub is a HydroBot module designed to connect together HydroBot modules in a star topology. The hub provides power and CAN connectivity to a total of eight channels. It has a DC barrel jack for connecting an external power supply, as

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Posted in HydroBot, Projects

HydroBot: Switches and Relays

RelayDrive is a HydroBot module designed to drive relays and other electro-mechanical devices. It consists of 4 low-side outputs, each rated for 1A continuous current, as well as 4 digital inputs, and is controlled over CAN. This module is intended to drive mechanical relays, solid state relays,

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Posted in HydroBot, Projects

HydroBot: Measuring Atmospheric Conditions

AirSense is a HydroBot module designed to measure air temperature, relative humidity, and barometric pressure. It uses the Bosch BME280 atmospheric sensor to take measurements and sends the results out over CAN. The module can measure temperatures from 0 to +65°C

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Posted in HydroBot, Projects


HydroBot is a modular control system for automating hydroponic gardens. This system is designed with three objectives in mind. First, it will facilitate optimal growing techniques by using scheduling and feedback control loops to maintain state and adapt to changing conditions. Second, it will simplify controls

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Therm RTD

Therm RTD is an addition to the Therm PID Controller family, with support for RTD temperature sensors. RTDs (or Resistance Temperature Detectors) use a coil of fine wire made from a material (usually platinum, copper or nickel) that has a very predictable

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Posted in Projects, therm

DIY 3D-Printed Model Rocket

Space has often been referred to as the final frontier, and many who look towards the heavens find themselves wondering what might be hiding just beyond our reach. Although commercial space missions cost well into the millions and even billions of dollars,

Posted in Uncategorized

Local Restaurants: The Ann Arbor Experience

Ann Arbor is known for its exceptional selection of local restaurants, but picking a place to try can be overwhelming. Here is a short list of my favorite places to eat in town that you won’t find anywhere else.

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Posted in Food