XPortHub is great if you need a combination of ports, but I often need a high density of one port type so I made RS485Hub with 6 x RS485 ports, 2 x CAN ports and 1 x USB. This is basically a simple Hat where I take advantage of the high number of RS485 ports…
The main objective with an Abstraction Layer is to protect user modules from changes between platforms. Code on user level should be portable and plug & play after you done a 10 minute task of soft-wiring. I decided on the name “Abtraction Layer” because HAL (Hardware Abstraction Layer) is missued to much and was not…
I feel bad about my 300.- USD 3D Printer collecting dust in my lab, so I want to do something about it. This was a Prusa i3 Gen 1 clone and it ha loads of issues that came with Gen 1 printers – that said, it actually work and do a decent job for what…
It’s been a while since I designed this 3KW 3-Phase Motor Controller without doing anything with it so I decided to give it an upgrade. The size of this is 100x25mm. It is very smal for it’s capacity and Perfect for larger drones. Removed 3rd current sensor. Remove the output holes at right and take…
A common problem with plotting lines in raster graphics is visualization errors as we display the graphics. Most times we can just ignore these, but as I am drawing scrolling real-time plots I also receive the side effect of an integer error. This show a line that due to integer rounding is a straight line…
I have so far never seen a performance test where C/C++ did not win an easy victory due to it’s nature, but I am very curious about what I see in front of me now. The failure I pointed out earlier is how .NET or Windows behave then you push it to it’s limits, but…
I did a lot of work in C#/Forms a few years back and found it to be a bit to slow for actual usage. It was easy to get fancy UI graphics done, but you instantly started struggling with performance on the screen. I remember using ca 1 month to get the functionality done and…
This pic is of a 6368-190KV while I just received a 6368-280KV – a 3KW Outrunner BLDC w/Hall Sensors that costed me 60.- USD all in all. This will be my 3-phase test motor on the 3KW Motor controllers thought while my controller is max 60V @ 50A these motors have a spec 36V @…
This illustrate the main functionality I want to achieve. The DDS can generate waveforms as well as more classic squares, triangles, sinus etc. I would like a signal that can be amplified to +/-20V and given a base offset anywhere within that range. The blue line illustrate a more classic square signal starting at…
I think I can achieve a decent function generator by combining AD9851, AD8008 and AD5231 as shown above. AD8008 is an amplifier with 650Mhz bandwidth and it uses a resistor for Gain adjustment – I think I can use AD5231 for that purpose. The Voltage input is max 12V so I should in theory be…