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Old 07-06-2011, 06:51 PM   #351 (permalink)
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I would be in for 2.

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Old 07-06-2011, 07:12 PM   #352 (permalink)
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Hi "Ianbartie"
I would like to obtain one of your boards and if possible build instructions.
Please let me know how I send money etc.
-Doug
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Old 07-11-2011, 06:43 AM   #353 (permalink)
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Thats 3 boards so far.
Any more takers?
The new ones will be PCB V2.
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Old 07-11-2011, 09:31 AM   #354 (permalink)
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Version 1.4 release

OK guys, version 1.4 is ready for release. Fixes/additions in this revision:
- write capacity to EEPROM immediately after SOC reset
- skip capacity write to EEPROM if battery amps less than 2 (thereby avoids write corruption during poweroff)
- change fuel gauge PWM frequency from 1.95kHz to 488Hz
- stop fuel gauge PWM duty cycle adjustment for SOC less than 20%
- add peukert bypass mode for effective 1.0

Along with this I also revised the PCB and schematic to replace R9 with potentiometer VR3. This allows fine tuning of the pack voltage in hardware (as Jackbauer did). BOM is updated to include this pot. It’s a smaller 12 turn 6mm size (only way it would fit!)
I already sent the gerber files to Ianbartie so anyone ordering from him will get this latest change.
The documentation for assembly, firmware config, users manual are now consolidated into one convenient pdf. I also included a 1.4 version of firmware based on a custom done for Ian. This is specific to the PIC18F2420 and uses the second PWM port for outputting battery amps on Terminal block 2 position 5 (formerly CANH) . This requires a jumper from U8 pad 4 to pad 7 (U8 not installed). What is output is a logic level PWM signal. An external RC circuit with op-amp buffer will be required to convert this to a voltage level. Battery amp range for this PWM2 can be scaled with parameter “fAmpscale”.

I’ll get these files to sawickm for upload to the wiki tomorrow.

At this point I’d like to bow out. With other commitments I really can’t continue support here. There are some really sharp guys on ecomodder familiar with this board who I’m sure can offer suggestions or changes to the firmware(harlequin2, jackbauer, ianbartie, apowers). For anyone using Protel or Altium who would want to revise schematic & layout, I could email the PCB design files.
Happy Ev’ing

-Chris
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Old 07-13-2011, 11:08 AM   #355 (permalink)
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Quote:
Originally Posted by Freyguy View Post
OK guys, version 1.4 is ready for release. Iíll get these files to sawickm for upload
Chris,

I uploaded your version 1.4 files into my into my file server.

The ReVolt Wiki links have been updated too.
Open ReVolt/PCB Schematics - EcoModder

- Mark
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Old 07-17-2011, 11:25 PM   #356 (permalink)
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EV Gauge

Here is a short video of the fuel gauge & the temp gauge, both driven by the LCD display.
The fuel gauge shows the current SOC & gets updated automatically during the charging cycle.
The temp gauge is now a battery amps gauge.
The tacho is driven by a Cherry proximity sensor & 2 magnets fixed into the motor coupling.

Thanks again, Chris. Would not have been possible without you.
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Old 07-18-2011, 10:37 PM   #357 (permalink)
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Nice work Ian!
I wasn't sure the temp gauge would be responsive enough to act as an amp meter but it appears to work fine. The lightning bolt is a nice touch. Implies "this vehicle powered by the Open Revolt controller"
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Old 07-22-2011, 09:05 PM   #358 (permalink)
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LCD Instrumentation Firmware HELP!!!

I hope that someone can help me with the firmware for the LCD Instrumentation. I have built the project but am a little short on knowledge when it comes to setting up and burning the firmware. I actually bought a k128 USB Pic programmer but really haven't quite got the hang of setting up the project. I probably have just enough knowledge to be dangerous. Well to cut this as short as possible what I need to know it what files will make up the project that will be burned onto my 18F2480 PIC?
I have read everything I can find but am still somewhat in the dark. I would really appreciate any help you can render to my cause. Maybe there is someone out there who has the time to give a hand, anyway thanks in advance.

Bill Rose


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Old 07-23-2011, 12:27 AM   #359 (permalink)
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Hi Bill
Go to my post #311 for how to burn the firmware.
Download the firmware from here
Open ReVolt/LCD Firmware - EcoModder
Unzip it then follow the directions in my post.
Download the User Manual here Open ReVolt/PCB Schematics - EcoModder
The user manual has a section on how to change the settings to suit your system. Give it a go & if you run into problems, one of us here can help you.
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Old 07-29-2011, 10:35 PM   #360 (permalink)
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Have you got enough people to get the boards yet. What would be the cost US currency? I would be interested in 1 board.

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