New PT100 Sensor Probe we are looking at
PT100 S120 Sensor Probe Body Model
Stainless Steel, M12 x1.75 process interface, M8 x 1.25 Gland.
Houses a 3mm PT100 pocket for a PT100 or Thermocouple.
Planned standard supply will be a 3 wire PT100.
New PCB design for a new potential job demo.
(Two Way Radio SELCAL / 5 TONE / SEQUENTIAL TONE decoding and encoding)
Using a STM32F405 for its floating point (using DSP for this application)
In this case we are using a Waveshare CORE405R PCB (I can’t buy the parts that cheap, and their board already has the basic support ready to go, big time saver for a demo)
includes support for
I have ordered 10 boards, only using 3 so far
Will exchange a board (just the pcb – no parts) for a coffee if you are in the Sydney area
T932 STM32F405 CORE405R Host PCB with TFT LCD and IO
Led Matrix Display Internals – LPC1788 CPU, isolated RS485 ports, Isolated Power Supply, Led Matrix Buffers, USB Host
I121 Led Panel Matric Display – Installed on a Road Pavement Grinding Machine
I121 Led Matrix Display – Installed on a Road Pavement Grinder
In this case the display LPC1788 microcontroller (Haoyu HY-LPC1788-Core) is running MODBUS master firmware, and there are two PT100 modbus modules in a separate enclosure.
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This power supply designed for mobile plant to resolve issues encountered in a battery charger in original equipment.
The battery charger was bypassed, replaced by this circuit.
Recent contract PCB Layout Design example
This is the PCB for the new Led Matrix Enclosure 
Isolated Power Supply, 2 Isolated RS485 ports, Micro SD Card slot, USB Host, Ambient Light interface, and buffers for the LED Matrix.
Uses a Haoyu LPC1788 module (NXP ARM Cortex M3 with more memory than you can poke a stick at).
We will design a version with Ethernet later this year.
A few views of our new Led Matrix Display Enclosure design
300mm x 180mm x 50mm
The side slides are for simple insertion into and extraction from a mounting cradle.
IP rated connector and ambient light sensor for auto dimming.
From the top –
Looking inside with the bottom cover removed
Starting on a new project.
A Temperature Monitoring System, on a mobile machine (a civil engineering machine in this case), with a LED Matrix display for the operators, and hand held control device for the owner / supervisor.
The system will be developed in phases…
To shorten the development cycle we will be buying in RS485 modbus modules for the IO.
The Controller (Modbus Master with 3 RS485 ports, Ethernet with internal switch, CAN port) and the display controller are being developed in house.
We will put up some more information as the parts come in and the system develops.
Hi All
I have been using the CC430F6137 for 433MHz network development lately
The boards I found to develop with are from AliExpress (search for CC430F5137 development board, look for the seller King Lei, and ask for the CC430F6137 433MHz demo board with the prototyping pads and footprints under the board, as shown below)
Making it an easy start into CC430 development.
I picked up some colour LED modules for daylight readable displays.
From Aliexpress Store Shenzhen LCCL Opto-Electronic Science & Technology Co., Ltd.
Shown below driven by a LPC1768. (The normal commercial application uses FPGA to handle an array of these display to build a large screen)
The displays use a serial -> parallel led drive, data in is 6 bits wide (2 rows clocked in at once, RGB), and uses two 74HC138s to select 2/32 rows. This appears to be a fairly typical arrangement for this type of display. (the smaller displays only clock in a single row, but the principle is the same)
The display shown is a P4 (4mm pitch between pixels), P3 is also readily available.
I intend to enclose this in an IP rated box with a few basic IO and RS485 and CAN ports.
There will be a single screen and a 3 screen version (That would be a LPC1768 for each display) giving a 96 pixel x 64 pixel display.
Please contact me if you would like any further information.
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