About Charles Pax

Charles Pax is the founder of Pax Instruments. Charles is the former Director of Research and Development at MakerBot Industries, having developed the MakerBot Replicator 3D printer.

Opensource spectrometer

Pure's spectrometer uses a nice little micro-spectrometer from hamamatsu. At $298 USD on Tindie it's not exactly the cheapest way to do spectroscopy, but it's a tight package and ready use with an Arduino. [Pure Engineering]’s C12666 Micro Spectrometer has applications ranging from detecting if fruit is ripe, telling you to put sunscreen on, to detecting oil spills. Like the [...]

By | May 11th, 2015|Notes|

Automation Board by GarageLab, LLC

The Automation Board by GarageLab, LLC on Kickstarter is a pretty neat board for controlling devices operating at wall current. Something like this could be used for automating devices like hot plates, incubators, and lamps. The lack of enclosure is a bit concerning however. […]

By | May 10th, 2015|Notes|

Breadboard oscilloscope, nScope

The nScope on Kickstarter looks like a convenient way to connect a computer-based oscilloscope to your breadboard project. It also acts as a power supply and function generator. The nScope is a fair deal at $69 USD, we just wish it were opensource.   nScope is a usb-powered device that plugs into an electronics prototyping breadboard. nScope’s [...]

By | May 10th, 2015|Notes|

DIY Spectrometer

Here's a DIY spectrometer (English). It looks hacked together, but it seems to work beautifully.   Typical spectrometers use prisms or diffraction gratings to spread light over a viewing window or digital sensor as a function of frequency. While both prisms and gratings work very well, there are a couple of downsides to each. Diffraction gratings [...]

By | May 10th, 2015|Notes|

Measuring Temperature On An AVR Without A Sensor | Hackaday

Here’s a very novel approach to temperature sensing. This is not accurate enough for lab work, but could certainly be used for general over-temperature alarms on your next project. Thomas basically compares the internal oscillator and watchdog timer temperature drifts to get a rough estimate of the microcontroller’s internal temperature. […]

By | May 9th, 2015|Notes|

UV Badge by x-labz

Here’s a lovely little project useful for monitoring your sun exposure. It even monitors humidity, pressure, and temperature. Well done for using the stunning and low power Sharp memory LCD. And with the simple clean enclosure, it looks a lot better than some other devices on the market. You can find the UV-badge on Hackaday.io. […]

By | May 9th, 2015|Notes|

Thermocouple connector design is complete

Since our March update we have overcome the biggest single issue we have faced: creating a custom thermocouple connector. It was wonderfully challenging and our team has learned quite a bit. As soon as we have our 10,000 piece order in stock you will be able to purchase the Pax Instruments surface mount thermocouple connector in our [...]

By | May 4th, 2015|T400|

T400 March Production update

The mission of Pax Instruments is to make opensource lab instruments, the essence of which is the creation of tools to enable your creativity. As we have seen with electronics design and 3D printing over the past few years, amazing things happen when people gain access to new tools that are useful, usable, and affordable. [...]

By | March 19th, 2015|T400|

Pax Instruments in Shenzhen

Hello from Shenzhen! Pax Instruments has been in Shenzhen, China for about a month finishing up the T400 design and setting up manufacturing. Electronics We spun electronics version 0.8 of the PCB and had a ton of trouble flashing the ATmega32U4. It looks like we got some bad chips. From now on we will only [...]

By | November 18th, 2014|T400|

How to setup a VPN in China

A few days ago the Pax Instruments team arrived in Shenzhen to manufacture the T400. There are many challenges ahead and we look forward to handling each one successfully. One of the more frustrating challenges is circumventing the internet censorship the government inflicts on the people who live here. Without censorship circumvention the internet can [...]

By | November 13th, 2014|Learning|