IoT design a usually a matter of antenna as already seen in different previous blog post. Antenna performance is the assurance of your capacity to deploy your object in larger zone and a way to save energy by reducing transmission power.
As we will see, if you get a hardware component and simply put it in a box its radio behavior will be totally different as the box is impacting the transmission.
This post will practically show you the impact of a box on a device radio quality.
I’ve got my miniVNA Tiny+ this summer and start making test with it. A VNA is a Vector Network Analyzer. Behind this dark name, this is a tool able to analyze the radio response of your circuit and ensure your circuit is tuned to the right frequency. From the data measured by this tool you can find the right adaptation circuit to match your central frequency.
The miniVNA Tiny+ is a low cost VNA solution less than 300€ covering frequencies from 1MHz to 3Ghz. These frequencies are good for most of IoT need : LPWAN around 868MHz and Bluetooth at 2,4GHz. The steps are 10Hz for a large precision. With two ports you can measure S11 – power transmitted and received over the same port – and S21 – power transmitted from port 1 and received over port 2.
The miniVNA Tiny+ is an usb solution working with a computer connected to and a software running on the computer. The software is based on Java and may support different Operating Systems.
Ordered from Kickstarter and received quickly, this solder paste dispenser really changed my life !! Now since about 3-4 month I’m using it regularly and it still mking me really happy.
It has start from a Kickstarter project I back on but failed the first time. This was disappointing as the classical tool I’m using for dispensing solder paste are really noisy. So when they did a second KS and make it I was really happy. More over they are neighbor of me (about 200km on the Est) and seeing a such good idea made from France is as a good news as a surprise.
Sometime when you want to place a SMD component on a PCB you can use a handy vacuum pump. I’ve tried different low cost model from AliExpress this summer and this post will tell you what is looking best to me for my use.
First of all, I’m not using this tool for components like small resistor, I prefer tweezers for such components. I’m using a handy vacuum pump for larger components like QPF, TSSOP, SOP, QFN…
I’ve tried 3 different tools from AliExpress from 1$ to 9$
I’m a regular user of different PCB services form my electronic design. Since 4 year now I’m mostly working with Eurocircuit but recently I tested different low cost solutions : seeed studio, jlcpcb and OSH Park. This is now an opportunity to compare these different solutions.
TD1508 is the FCC version of the TD1208, they are pin to pin compatible and based on the same SDK so converting an object working on a TD1208 sounds easy. Practically speaking there are some preparing steps because of some tiny bugs to solve.
Let see how to port a Telecom Design existing firmware for TD1208 to TD1508 (from ETSI to FCC).