Desining a new kit, thoughts from the blue desk - Page 2 - Electronic Circuits Projects Diagrams Free

blueroomelectronics · 5th November 2009, 07:04 PM

I'll be putting the adapter on the PCB, I'm really on the fence about the SD card. Pretty soon standard SD will be disappearing in favor of SDHC & SDXC (both use a 4bit mode)

blueroomelectronics · 7th November 2009, 05:14 AM

Well the SD card will be sacrificed in favor of an 8pin DIP/SOIC SPI EEPROM / Flash. These inexspensive ICs should be plenty big for an embedded web server upto 8M bytes can be had for less than $5.
An addition will be 4 type C relays NO/C/NC and two opto coupled inputs on RB0,1

blueroomelectronics · 17th November 2009, 06:01 PM

One of Ladybug's functions (at least in my opinion) will be a HVAC / furnace / AC controller with Ethernet

5V Switchmode DC supply LM2575 (Relays / 3.3V regulator)
3.3V linear supply

Standard peripherals (100% sure)
One Ethernet jack with magnetics
Four Panasonic JS1-5V Relays
Two opto isolated inputs HCPL-2630
SPI EEPROM / Flash upto 8Mb
At least one 8 pin I/O port EasyPIC compatable

Likely to be there (80%)
DE9-Male DCE RS232 with HW/SW UART (jumper selectable)
RS485 SW UART

On the fence (50% either way)
XBee / XBee Pro socket with HW/SW UART (jumper selectable)

Do we need them?
433MHz RF receiver (handy for digital thermometers)?
NO/C/NC or NO/C relay outputs?
32,768Hz watch crystal?

Gone
SD card socket.
iButton connector (just use an I/O port if you need it)
Temperature sensors (also can be added via DIY I/O expansion)

As always your opinions on this would be appreciated.

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5th November 2009, 07:04 PM	#16
blueroomelectronics	I'll be putting the adapter on the PCB, I'm really on the fence about the SD card. Pretty soon standard SD will be disappearing in favor of SDHC & SDXC (both use a 4bit mode) __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

7th November 2009, 05:14 AM	#17
blueroomelectronics	Well the SD card will be sacrificed in favor of an 8pin DIP/SOIC SPI EEPROM / Flash. These inexspensive ICs should be plenty big for an embedded web server upto 8M bytes can be had for less than $5. An addition will be 4 type C relays NO/C/NC and two opto coupled inputs on RB0,1 __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

17th November 2009, 06:01 PM	#18
blueroomelectronics	On the fence. One of Ladybug's functions (at least in my opinion) will be a HVAC / furnace / AC controller with Ethernet 5V Switchmode DC supply LM2575 (Relays / 3.3V regulator) 3.3V linear supply Standard peripherals (100% sure) One Ethernet jack with magnetics Four Panasonic JS1-5V Relays Two opto isolated inputs HCPL-2630 SPI EEPROM / Flash upto 8Mb At least one 8 pin I/O port EasyPIC compatable Likely to be there (80%) DE9-Male DCE RS232 with HW/SW UART (jumper selectable) RS485 SW UART On the fence (50% either way) XBee / XBee Pro socket with HW/SW UART (jumper selectable) Do we need them? 433MHz RF receiver (handy for digital thermometers)? NO/C/NC or NO/C relay outputs? 32,768Hz watch crystal? Gone SD card socket. iButton connector (just use an I/O port if you need it) Temperature sensors (also can be added via DIY I/O expansion) As always your opinions on this would be appreciated. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/ Last edited by blueroomelectronics; 17th November 2009 at 06:09 PM.