Fun with chemicals, lasers and really high voltages

Homebrew ESD Safe Component Trays. Assembling printed circuit boards is easy. You manufacture the PCB at location A, and then ship it to location B, along with some gerber files and a component list. The PCB is covered with a stencil that is used for applying solder paste. The PCB (with applied paste) is then fed into a pick and place machine that mounts the components, before it is fed into a reflow oven. »

A functional IAQ IoT Device

In the previous post, we prototyped a simple sensor shield in Eagle. There is still plenty of available space left on the PCB and sensors are cheap. Let’s add some more stuff and build a functional device. Adding Sensors We already have a CO2 sensor in the design. This can detect CO2 concentrations of 450 - 2000 ppm and TVOC (Total Volatile Organic Compounds) equivalents in the 125-600 ppb range. »

Prototyping with EE02

The EE02 is not an end user device. It is a module that is intended as a component in other designs - assembled by machines. Our aim was to fit the design in the smallest form factor possible, while maintaining the desired performance characteristics. This translates to surface mount technology that can be maniupulated by pick and place machines - not people. But, please… Don’t panic ! Even though surface mount components are harder to tinker with than through hole components, it is entirely feasible for makers and hobbyists to make their own printed circuit boards without having to invest significant amounts of money and effort. »

The 3 day build

The Exploratory Engineering team is in documentation mode these days. We have created a working device, but we also have to create reference documentation and tutorials before it can be released. We already know that our EE02 module is physically small (approximately 30% smaller than a LoPy module). We also know that it extremely power efficient (The EE02 could theoretically be in standby mode for 120 years - using the capacity of two AA batteries). »