Author: Jan

7x Stepper Revision 1.3

This is Revision 1.3 of the 7x Stepper Driver. Added resistors on SPI1. Changed to new SWD format. Added protection against wrong PSU polarity. Moved leds into board. Major improvement on ground planes. Previous change on 1.2 was that I turned the Connectors around.  I re-routed the entire module from scratch and created ground planes…

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16xServo Hat

This is rev 1.3 of 32xIO/Servo Hat. It’s been a few revisions that I never bothered to build because the original is working well. But, I need some changes on this: SWD need to change to new format. Connection to SPI1 need resistors. 2nd Power connector needs to be added. Connection between motor and 5V…

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Ethernet Ground Plane

Just showing the ground plane on the Ethernet/Wifi Hat. I am very pleased with this one and the approach I used here. Earlier as I routed I have routed on both sides with ground plane becoming very fragmented. On this one I only used ground plane as an exception and only for minimum distances. The…

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Modular Control System

This drawing is an overview of the Hat’s in progress. A few is only on the planning stage, but most electronics is on prototype level and SW is coming on. Raspberry PI is the obvious core if I need heavier processing. Due to the nature of it’s SPI I can only connect one of these…

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LAN8710 vs Pro-EP10

Again I am not done routing, but I wanted to illustrate ca the space cost of adding an Ethernet Phy and why I was so interested in Pro-EP10. You can see Pro-EP10 footprint at left in green, while LAN8710 and RJ45 w/magnets build in is in blue at left. Using Pro-EP10 would be a huge…

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Wifi/Ethernet Hat

Not routed the Hat yet, but got all components on the PCB and it looks possible. Using an optional 2.4Ghz antenna on this one. It will take ca 1 week and I probably have the first draft routed. It tends to og fast once I start. What I usually do is to do a bit…

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Wifi/Ethernet Hat Drafts

Getting on with my ESP32 based Wifi/Ethernet Hat. First draft of schematics below. This is the first time I try LAN8710 so all bets off. I am most worried about the 100Mhz signals here. The next picture show components before I place and route the PCB. This looks tight tbh. LANEnable will switch power on/off…

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Ethernet Hat’s ESP32/HLK-7688A

I decided that I want to make 2 different Ethernet/Wifi modules With different purpose. With Raspberry PI it will be 3, but RPI and ESP32 overlap in functionality. ESP32 with Ethernet/Wifi/Bluetooth is a very attractive “Connector” solution where I can add more connections by adding multiple Hat’s. I can sadly only add a single Raspberry…

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