WORKING ON SOMETHING NEW & LOOKING FOR FEEDBACK FROM MY FELLOW HARDWARE ENGINEERS :)

Hello all - I am in the late stages of design for a new hardware testing gadget specifically tailored to end of line / bed of nails testing of PCBAs. The gadget's purpose is to make it much faster and easier to create test jigs. Please contact me (info@trendeca.com) if you are a hardware engineer and would be willing to confidentially review my new design and provide a bit of feedback. Any advice would would be greatly appreciated - Thanks!

Want A Trendeca Model 100?

Please contact info@trendeca.com if you are interested in purchasing the Trendeca unit pictured above.


The Problem

As an engineer, I often want to simultaneously measure voltage, current, temperature, digital inputs, and perform some basic test automation. I wish to record this data at a relatively low data rate over a few hours or days to verify my prototype designs or hunt bugs in existing hardware.

I find that the existing DAQ technology is complex to configure, and it always seem to take at least a few hours to get a test going (find shunt resistor / configure desktop software / write python script / etc.).


Approach

The purpose of the Trendeca device is to make data acquisition and test automation radically simple. Some of the time saving features include:

-Wide input ranges with automatic gain selection so data is recorded at the best possible resolution

-5 inch touch screen display allowing the user to set test parameters in seconds

-Wifi connected so the user can monitor and control tests from their desk via GUI

-Integrated current measurement up to 10 Amps and as low as 1uA. Automatic shunt resistor selection to apply minimum burden voltage required given current amplitude.

-Built in test automation, including 10A capable solid state relay.

-Saves data directly to USB drive in CSV format. Data can also be downloaded remotely to your desktop computer via the remote control GUI.

-”Push to connect” wire terminals: no need to find a tool to connect your test leads


Trendeca Website:

http://trendeca.com/


Example Data 

The local testing we have performed over the past few months has gone quite well. We are excited by the positive feedback we have gotten from our colleagues, and have further refined Trendeca’s design based on their input. Below are a few examples of the data that Trendeca has produced.

Portable GPS Device Battery Charging

Trendeca was used to test the electrical and thermal performance of the battery charging feature of a portable GPS device.   

As is commonly done with lithium ion batteries, a “constant current, then constant voltage” charging method is implemented. Interestingly, the battery data indicates that the circuit designers have chosen to limit the maximum voltage to 4.1V (as opposed to the more commonly used 4.2V). Though this choice sacrifices some battery capacity, it is likely this decision was made to extend the total number of charge/discharge cycles the battery can endure.

The thermal data indicates that the battery temperature rose a maximum of 6C above ambient during charging. This is expected as some energy is lost as heat during the electrochemical process that stores electrical energy...

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