I have always avoided using FedEx or similar services as I import Electronics due to the cost of their services. But, as I decided to buy 4 packages from Arrow in US and found that they offered “free” P&P using FedEx – why not? I am really impressed with Arrow and some of the deals…
This one was not as hard to route as I expected. I had to do a few compromises and I need to look things over. Ground plane include a few lines that I want separate etc + I need to ensure that all ground planes are connected. But, this looks good. A bit to dence…
I purchased 4 packages from Arrow in US (MOSFET’s) and I was surpriced that P&P was included free – and yes it is. But, Arrow uses Fedex that add a fictive P&P as this is declared to Norwegian customs and this made the value look like it was above the free import limit – which…
This will be work in progress for another week at least. I have routed the right side of DRV8301, but I have the left side + MCU left. I initially started with a STM32F303CB, but decided to move up to a STM32F405RG. Current size is ca 100mm x 25mm and components only on top side.…
This show 3 components on a 3D model. The one to left is a 0603 package, and if you have any idea of how small that is then you also see the size of INA210 in the middle. INA194 is SO-23/5 which is “easy”. I consider 0603 easy as well, but 6 pins on that…
I tried to use this to demonstrate a 3-phase and realize to my shock that I have no direct access to the L293 Input. The logic chip in the middle convert this to 4 x DC drivers with logic that will get in the way of a 3-phase – so back to vero board.
This little circuit is a 5-36V 3-Phase motor driver. In this case I use 3 channels of a classic L293D to output to a small 3-phase motor and run it using a Trapzoidal motor algorithm. I am running L293 on 3.3V, but it will work better on 5V and an Arduino is better for this…
INA210 that I used earlier is only rated for 26V, and it is a 6-pin extremely small package that was a Challenge to get soldered. I have 9 more chips to destroy before I let INA210 rest, but I will not continue with this for 3 reasons (1) size of a 6 pin package and…
Current sensors are a challenge due to noise as you need to grab PWM signals. I am doing 2 things here: I am grabbing both current sensing and ground from the same place. directly on each side of the shunt. The EDA I use will try to include this in a ground plane, so I…
One of the main concern if you want to get 50A out is the current path and making sure it support 50A. The line in red show an actual example path that will have to support this. The entire driver area is only 40mm x 25mm. 60V in using top PCB lane down, over high…