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Yeah, I forgot about the conversion losses. Regarding the fuses, I tried everything and nothing worked. The package is on the way back to you anyways. Thanks!
I tried changing the fuse bits to be sure. I followed the setting on your FAQ page regarding a new chip: avrdude -c usbtiny -p m328p -B 250 -F -U lfuse:w:0xe2:m -U hfuse:w:0xd1:m -U efuse:w:0x06:m
With the short across R4 (I still maintain bad ENET or wrong ENET jack), I was reading 0.1A using a 12V bench power supply. That just puts it over 1.2W which was quite high I thought. When I take out the enet jack and power the entire board now, I get 0.06A x 12V = 0.72W. Still, no MSG on LCD screen.
I’m sending back the completed board tomorrow. Enet jack is de-soldered.
Okay. The jack and the board does not make sense then. If I install the jack, I get a short across the 49.9 resistor. Take the jack off and it is okay.
I will send it back this weekend. In the meanwhile, can you send out a verified kit to me again? I am anxious to finish this project. I was the order [email protected]. Thanks!
There is something I really don’t understand.
In the schematics, the center taps for the enet jack with magnets is pin 6 and pin 3 but the datasheet for HR911105A says it is a type 9 schematics and pins 4 and 5 are center taps…
ENET JACK Schematics: ftp://imall.iteadstudio.com/Connector_Socket/DS_IM120814005.pdf
None the less, I look off the ENET jack with a solder sucker and now I no longer get a short between R4 and I get 50 ohms as expected. I stick back in the ENET chip and it is drawing 60mA on 12V input with everything plugged in except for enet jack.
Still, the LCD is not being initialized….giving up pretty soon…
@ray wrote:
There are a few other potential causes, for example:
– the LCD might be damaged, although this is very unlikely unless if you have reason to believe that it’s damaged by 24VAC
– the MCU’s reset line (pin 1) is for some reason held to ground, causing the MCU to remain in reset state (also very unlikely since you can program the MCU successfully).I am applying a DC 12V using bench power supply and before I put in any chips, I measured 5V and 3.3V like in your tutorial. LCD does not seem to be dead. Pin 1 of MCU is pulled high to 3.3V.
At this point, i don’t know what could be wrong. Do you have a program I can flash to ensure the mcu is running? Usually i have a serial terminal that I can see if things are alive or not.
Flashed 1.8.2 again to show you the output and still doesn’t work.
E:!D Drive!My ProjectsOpenSprinkler>avrdude -c usbtiny -p m328p -F -U flash:w
:firmware1.8.2.hex
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e9514
avrdude: Expected signature for ATMEGA328P is 1E 95 0F
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "firmware1.8.2.hex"
avrdude: input file firmware1.8.2.hex auto detected as Intel Hex
avrdude: writing flash (32678 bytes):
Writing | ################################################## | 100% 19.98s
avrdude: 32678 bytes of flash written
avrdude: verifying flash memory against firmware1.8.2.hex:
avrdude: load data flash data from input file firmware1.8.2.hex:
avrdude: input file firmware1.8.2.hex auto detected as Intel Hex
avrdude: input file firmware1.8.2.hex contains 32678 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 12.62s
avrdude: verifying ...
avrdude: 32678 bytes of flash verified
avrdude: safemode: Fuses OK
avrdude done. Thank you.I realized the note in the directory after that and downloaded the repro as a zip. Flashed 1.8.2 and 1.8.3 and it still doesn’t work. I am a EE by day so I’m pretty qualified to say something is wrong hardware wise. The enet chip seems to be drawing close to 1 watt in power. When I measure one side of the 49.9 bias resistors, one side measures 25 ohms expected and the other side 0.5. If the enet chip is not I’m, is the board supposed to boot? How can I tell if the firmware is running or not. Does the internal oscillator go to an external pin? I have an oscpoe. Thanks!
