The good thing about a blog is that it is excellent for notes – if I make my work-notes here they are called “documentation” 
The following are programming notes for the PSU Control Board: PA10 – GPIO J1-4 Relay 1 – Connect extra 12V – 36V If Relay 2 is On. PA9 – GPIO…
This pic shows my analogue regulator. You can see the 2 transistors and a fan in the back and my DIY load array on top left. I am actually quite happy with this after I mounted it on a proper PSU source in. The only things left is to get the current regulator working, but…
I purchased this Lab PSU 0-30V /5A from ZHAOXIN a few years back, but I have not really been using it much. What I discovered as I started using it was very dissapointing. This Lab PSY from ZHAOXIN is far from cheap – it usually cost 80ich USD + 50ich P&P as well as ca…
These cost almost nothing, so I bought a few and plan to use them on my Lab PSU. They have separate PSU and measurement cables – so initially I connected the PSU to the same PSU as I use – the result was that Voltage increased as Ampere increased. Realising the mistake I connected a…
One important issue is that we maintain stable out voltage during changing load. The diagram above show my current test setup using a cheap lab PSU from ZHAOXIN. To be honest this cost ca 60.- USD and the same in P&P to Norway. The Thaoxin is set to Output 12.3V. The BasicPI Analogue Regulator is…
Will upload proper pictures later… Received the PCB’s for the Lab PSU yesterday and soldered up the boards. The Regulator works fine – I was only able to test it with 5A at which point I burned the transistors due to overheating. That was with 30V in and 6V out so we dissipate ca 24*5…
A classic PLC design tend to use what we call “Remote IO”. We basically have a top-side control system that read some input and control some output through a “long wire”. The PLC itself contains little or no intelligence. This design have a legacy from days where CPU power was a limitation, but it is…
Just an update on the backbone board. I have decided to use a “All-In-One” central for home automation, but I still want to make a minimized PLC alike system. This backbone is very small – only 50mm width and 65mm height. The connectors are basically so tight with only ca 6.3mm apart that we are…
Finally got the PCB’s for the Universal Motor Controller, so we will have some fun the next days. Sadly I also instantly realise a few mistakes. The holes in the adapter board is to small for the capacitors I bought, but I can manage by using a small drill to widen some holes. Comparing the…
I have written a lot about the intentions with easyIPC so it’s time we dig into the details of the protocol. easyIPC will follow the OSI model on a pragmatic level as illustrated below. Smart SPI, RS-X and CAN-X are layer 2 links. Their only responsibility is to transport generic data between two nodes and…