Thanks alot Greg,
Do you know what sort of accuracy iteadstudio can make the boards to? Have you ever had any trouble with the tracks being too close?
Dan
LTC6802 based 12 cell slave.
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Re: LTC6802 based 12 cell slave.
I've not had a problem, but if your layout is very tight you might want to have a look at this goof from itead, but it was over a year ago, it may be better now. http://www.eevblog.com/2011/03/11/eevblog-155-itead-studio-pcb-prototype-goof/
Or you could send a test board and see how it goes. It's around £10 for 10 5x5cm boards. Mine have been dispatched, so I might see them this week, hopefully no later than next week. I'll post pictures.
Or you could send a test board and see how it goes. It's around £10 for 10 5x5cm boards. Mine have been dispatched, so I might see them this week, hopefully no later than next week. I'll post pictures.
Greg Fordyce
Daewoo Matiz
http://www.evalbum.com/4191
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http://www.evalbum.com/4191
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Boards have arrived!
Postman Pat delivered my boards today!
I've ordered the rest of the components for Monday.
I've ordered the rest of the components for Monday.
Greg Fordyce
Daewoo Matiz
http://www.evalbum.com/4191
Daewoo Matiz
http://www.evalbum.com/4191
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Re: LTC6802 based 12 cell slave.
Excellent work Greg, that looks like a nicely laid out board.
Fingers crossed with the 6802 though, 0.5mm pin separation ain't gonna be easy!
Mike
Fingers crossed with the 6802 though, 0.5mm pin separation ain't gonna be easy!
Mike
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Re: LTC6802 based 12 cell slave.
I'm saving the 6802 for last. First thing will be to get the pic on and test master and slave busses with simulated cell readings in software.
Greg Fordyce
Daewoo Matiz
http://www.evalbum.com/4191
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Re: LTC6802 based 12 cell slave.
You are really getting the hang of that pcb layout program now!!
Regards Peter
Two MK1 Honda Insight's. One running 20ah A123 Lithium pack. One 8ah BetterBattery Nimh pack.
One HCH1 Civic Hybrid running 60ah A123 Lithium pack.
Two MK1 Honda Insight's. One running 20ah A123 Lithium pack. One 8ah BetterBattery Nimh pack.
One HCH1 Civic Hybrid running 60ah A123 Lithium pack.
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Re: LTC6802 based 12 cell slave.
Nice and tidy work Greg, I'm salivating . What width did you make the traces going to the LTC6802?
I'm using 0.2mm but I've never done them as narrow before and I'm flapping a little about it.
Are you hand soldering? Are your caps and resistors etc 0805 packages? Hope you've bought a flux pen!
Derek
I'm using 0.2mm but I've never done them as narrow before and I'm flapping a little about it.
Are you hand soldering? Are your caps and resistors etc 0805 packages? Hope you've bought a flux pen!
Derek
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Re: LTC6802 based 12 cell slave.
They are 0.2mm. I will be hand soldering, but I've made the pads on the 6802 longer than normal which should help make things a bit easier. The resistors are 0603. For the caps I am using 0603 for 100nf and 0805 for 1uf.
Greg Fordyce
Daewoo Matiz
http://www.evalbum.com/4191
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Re: LTC6802 based 12 cell slave.
I'm pleased with it, and as long as I am trying new things heres a small program to flash the leds on the board. Just a quick test program to check ICSP and basic operation.retepsnikrep wrote:You are really getting the hang of that pcb layout program now!!
Code: Select all
-- ------------------------------------------------------
-- Title: Blink-a-led of the Microchip pic16f886
--
-- Author: Rob Hamerling, Copyright (c) 2008..2010, all rights reserved.
--
-- Adapted-by: Greg Fordyce on 4 Aug 2012
--
-- Compiler: 2.4o
-- Revision: $Revision: 2760 $
--
-- Original file is part of jallib (http://jallib.googlecode.com)
-- Released under the BSD license (http://www.opensource.org/licenses/bsd-license.php)
--
-- Description:
-- Sample blink-a-led program for Microchip PIC16f690.
--
-- Sources:
--
-- Notes:
-- - Original File creation date/time: 14 Mar 2010 14:33:00.
--
-- A small program to quickly test the 6802 slave board.
-- Red and Green leds should flash alternatly.
-- ------------------------------------------------------
--
-- ******************** Compiler Results *********************************
-- Errors :0 Warnings :0
-- Code :76/8192 Data:4/352 Hardware Stack : 0/8 Software Stack :96
-- ***********************************************************************
include 16f886 -- target PICmicro
--
-- This program uses the internal oscillator at 8 MHz
pragma target clock 8_000_000 -- oscillator frequency
-- configuration memory settings (fuses)
pragma target OSC INTOSC_NOCLKOUT -- internal oscillator
pragma target WDT disabled -- no watchdog
pragma target MCLR external -- reset externally
--
enable_digital_io() -- make all pins digital I/O
--
OSCCON_IRCF = 0b111 -- set internal oscillator for 8 MHz
--
-- Specify the pin to which the LED (with serial resistor!) is connected:
alias red_led is pin_A0
pin_A0_direction = output
alias green_led is pin_A1
pin_A1_direction = output
--
forever loop
red_led = on
green_led = off
_usec_delay(250_000)
red_led = off
green_led = on
_usec_delay(250_000)
end loop
--
You may have noticed this isn't pbp. JAL is open source and free. We'll see how it goes. Program complies with no errors, but is untested.
EDIT: Jal home page is at http://www.casadeyork.com/jalv2/
Greg Fordyce
Daewoo Matiz
http://www.evalbum.com/4191
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ICSP problem
Just tried soldering a couple of boards and have a problem with the ICSP. When I plug it in the pic overheats and won't program. Anyone see a problem with the schematic? http://www.batteryvehiclesociety.org.uk/forums/download/file.php?id=336
EDIT: Found the problem got pins 1, 2 and 3 in the wrong place. I'll make an adapter and start on a list of corrections for the next board.
EDIT: Found the problem got pins 1, 2 and 3 in the wrong place. I'll make an adapter and start on a list of corrections for the next board.
Greg Fordyce
Daewoo Matiz
http://www.evalbum.com/4191
Daewoo Matiz
http://www.evalbum.com/4191
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