Pascal,
Received my unit last week, just got it connected into my hub and by all
accounts worked just fine. On the weekend I will get it installed into a
case with the output FET's installed so I can play with the device with real
devices connected. Can't wait to get my hands on all those variables to
adjust as shown in owfs
rob
-----Original Message-----
From: Pascal Baerten [mailto:[email protected]]
Sent: Monday, February 22, 2010 10:55 PM
To: OWFS (One-wire file system) discussion and help
Subject: Re: [Owfs-developers] BAE0910 tinyboards -Preparing to get it
upandrunning
Hi Rob,
If you plan to use OUT pin for pwm, a pullup against +5v is recommended.
Other pwm don't need external pull up/down.
You may connect directly the FET gate to the header, tinyboard already have
a 470 ohms resistor between OUT pin and header.
For an inductive load, it is recommended to protect your FET with a free
wheel diode.
Pascal
2010/2/22 Rob Conway <[email protected]>
Got my board today must say it looks like the picture however a lot smaller
than I thought. Should be very easy to install into a small case.
Question: For the "PWM" and "OUT" driving a FET.
Can I just connect a FET directly to the output and have a pull down (10k)
resistor to gnd ?
I have also seen a recommendation to place a 1k resister between the output
and the gate of the FET. This is if the FET fails and you end up with Vcc
directly on the output.
FYI I have purchased some IRF540 N-Mosfets. Plan to test run PWM somewhere
between 20-160hz as per http://www.maxim-ic.com/app-notes/index.mvp/id/1784
I am only driving a 12V 7W small blower.
rob
-----Original Message-----
From: Rob Conway [mailto:[email protected]]
Sent: Saturday, February 20, 2010 9:14 AM
To: 'OWFS (One-wire file system) discussion and help'
Subject: [Owfs-developers] BAE0910 tinyboards -Preparing to get it up
andrunning
In preparation to getting this device I understand I have a couple of tasks,
1) Update to the latest owfs so that one is OK. I also assume once I
connect it via owfs the parameters will be shown via owhttp so that bit
should be OK. Is there any issue using a 1wire hub ? I have the
hobbyboards unit.
2) I was wondering though if you have a guide to the installation of the AE
compiler and a sample program which can be compiled and loaded through owfs.
I noticed the source code is on the site. I am using ubuntu.
3) I have purchased some N channel mosfets which I hope to use 1 for PWM
(cooling fan) and the other to control my heater relay. For my first
project, temperature control, I hope to simply get the host to write the
current temperature and control setpoint to the BAE0910 and let it control
fan speed and heater.
rob
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www.brain4home.eu
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