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Projects by members => Projects by members => Webmug => Topic started by: Steve on February 20, 2009, 18:33:30 pm

Title: Webmug projects
Post by: Login to see usernames on February 20, 2009, 18:33:30 pm
Welcome Webmug.
I placed your pictures here in yr project section, so others see that you are a builder.
It looks great! ;)

br
Steve
Title: Re: Webmug projects
Post by: Login to see usernames on March 10, 2009, 10:44:16 am
Hello everyone!

This is my first post here on this great forum, maybe someone was wondering what my experiments are.

For a while I have gathered the components to build a Fuel Cell for testing purposes which has six parallel 316L tubes of each 10CM in length with a 1MM gap in between.
Also a single cell with one tube.

Some of you may be wondering what all the stuff on the table is in the second screenshot.
Well one normal DC power source 2x 12V 1x 5V 3Amps and one oscilloscope. Also a simple circuit to change Voltages to use a PWM output from microcontrollers.

Also a Lawton circuit is available because I still need to implement the gating functionality in the microcontroller. I also need to build the input circuit for pulse feedbacks to allow quick changes in freq and gating. But the problem is that I don't know what the voltage will be when hitting resonance in transformers and chokes. The feedback pulses can easily fry the 3,6V input port ADC of the microcontroller so this will be a critical circuit.

Also I'm gathering the needed equipment to give the Alternator setup a try, starting with a Variac (0 to 250V 8Amps), a washing machine motor 230V/3Amps (max 2750rmp) and a 55Amp alternator. With a 1:2 on the alternator I hope to hit the harmonic resonance in the alternator. Maybe later I'll try regulating a self sustaining loop with a microcontroller.

When testing/building starts I'll post my steps and progress.
Title: Re: Webmug projects
Post by: Login to see usernames on March 10, 2009, 12:22:59 pm
Hello everyone!

This is my first post here on this great forum, maybe someone was wondering what my experiments are.

For a while I have gathered the components to build a Fuel Cell for testing purposes which has six parallel 316L tubes of each 10CM in length with a 1MM gap in between.
Also a single cell with one tube.

Some of you may be wondering what all the stuff on the table is in the second screenshot.
Well one normal DC power source 2x 12V 1x 5V 3Amps and one oscilloscope. Also a simple circuit to change Voltages to use a PWM output from microcontrollers.

Also a Lawton circuit is available because I still need to implement the gating functionality in the microcontroller. I also need to build the input circuit for pulse feedbacks to allow quick changes in freq and gating. But the problem is that I don't know what the voltage will be when hitting resonance in transformers and chokes. The feedback pulses can easily fry the 3,6V input port ADC of the microcontroller so this will be a critical circuit.

Also I'm gathering the needed equipment to give the Alternator setup a try, starting with a Variac (0 to 250V 8Amps), a washing machine motor 230V/3Amps (max 2750rmp) and a 55Amp alternator. With a 1:2 on the alternator I hope to hit the harmonic resonance in the alternator. Maybe later I'll try regulating a self sustaining loop with a microcontroller.

When testing/building starts I'll post my steps and progress.

Hi Webmug,

Thank you for informing us about your projectstatus.
It nice to see that you work with microcontrollers.
Is it possible that you share that part specifically?
I would like to know more about that.

If you need any help with alternators and tubes, just ask . ;)

br
Steve
Title: Re: Webmug projects
Post by: Login to see usernames on March 11, 2009, 12:53:59 pm
The microcontroller I’m using is the STM32F103 which uses the ARM Cortex-M3 processor for embedded systems.

More information is available on the olimex website: http://www.olimex.com/dev/stm32-103stk.html (http://www.olimex.com/dev/stm32-103stk.html)

(http://www.olimex.com/dev/images/ARM/ST/STM32-103STK-1.jpg)

It has two 12bit ADC's onboard for analog input signals, with the 3 timers we can enable/disable other input output ports up to 72MHz to get the square signal we need.
Only is it not a linear and above 1MHz the steps are very large so this kit is not usefull for the higher freqs. But from 0 Hz to 100 KHz it’s quite accurate. Another timer can be used to implement the gating functionality.

This moment I can start the controller and connect trough USB by using a laptop or PC to instruct it to activate a specified freq.
With a simple circuit we can pulse a mosfet and a transformer or limit the alternator output.
The ADC inputs can be used to check Transformer voltage output from feedback circuits or read water level or pressure in the cell but I first need to now what the voltages are or signals.

If you have questions I will try to answer them.

Did you also tried a self sustaining loop with the alternator?
I’ve read on this forum (Topic: How Stanley Powered His alternator) that Hydro used a 555 timing circuit to regulate this, how did you adjust it?
Title: Re: Webmug projects
Post by: Login to see usernames on March 10, 2011, 19:42:22 pm
Hi Webmug,


My stm32 should be here any day now.  I'm having some trouble finding info on connecting a cny75 optocoupler between the stm32 and my mosfet.  Could you share for example what you do.  much obliged.


kb
Title: Re: Webmug projects
Post by: Login to see usernames on March 10, 2011, 20:52:33 pm
Hi Webmug,


My stm32 should be here any day now.  I'm having some trouble finding info on connecting a cny75 optocoupler between the stm32 and my mosfet.  Could you share for example what you do.  much obliged.


kb
Great, what type of board did you choose? Above one like mine?
I use this circuit for PULSE and GATE frequency. Credits to goeytex.
http://www.ionizationx.com/index.php?topic=342.msg11156#msg11156 (http://www.ionizationx.com/index.php?topic=342.msg11156#msg11156)
It has a MOSFET driver.

Br,
Webmug
Title: Re: Webmug projects
Post by: Login to see usernames on March 10, 2011, 22:51:28 pm
The microcontroller I’m using is the STM32F103 which uses the ARM Cortex-M3 processor for embedded systems.

More information is available on the olimex website: http://www.olimex.com/dev/stm32-103stk.html (http://www.olimex.com/dev/stm32-103stk.html)

(http://www.olimex.com/dev/images/ARM/ST/STM32-103STK-1.jpg)

It has two 12bit ADC's onboard for analog input signals, with the 3 timers we can enable/disable other input output ports up to 72MHz to get the square signal we need.
Only is it not a linear and above 1MHz the steps are very large so this kit is not usefull for the higher freqs. But from 0 Hz to 100 KHz it’s quite accurate. Another timer can be used to implement the gating functionality.

This moment I can start the controller and connect trough USB by using a laptop or PC to instruct it to activate a specified freq.
With a simple circuit we can pulse a mosfet and a transformer or limit the alternator output.
The ADC inputs can be used to check Transformer voltage output from feedback circuits or read water level or pressure in the cell but I first need to now what the voltages are or signals.

If you have questions I will try to answer them.

Did you also tried a self sustaining loop with the alternator?
I’ve read on this forum (Topic: How Stanley Powered His alternator) that Hydro used a 555 timing circuit to regulate this, how did you adjust it?

Yes, i also had the selfsustaining alternator.
The trick was to use some charge out of the waterfuelcell.
But the charge was bigger then needed, so we used a pulsing circuit to control it.

Title: Re: Webmug projects
Post by: Login to see usernames on March 10, 2011, 23:40:52 pm
Webmug,


This is the one.  http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280629429727&ssPageName=STRK:MEWNX:IT#ht_2531wt_909
I use the goeytex two pwm syncro circuit now.  I'll be powering the cny75 opto with 5 v but am unsure about input output and power and ground.  I'll be playing with them according to the datasheet when they come and discover how yet wanted to see what you guys are doing.  I'm guessing that you run the opto output into a mosfet driver anyway.  Thanks for the help...


kb
Title: Re: Webmug projects
Post by: Login to see usernames on March 22, 2011, 01:16:27 am
Webmug,


My ebay stm32 will not connect to usb, tried three computers with no luck, drivers won't load,  lsusb in linux doesn't show a device except the pl2303,  I may get the one you have...  then I 'll be asking questions for sure
all the computere see the usb pl2303 serial adapter for terminal use, but not the USB jlink                    hopes are dashed for now
regards,
kb
Title: Re: Webmug projects
Post by: Login to see usernames on March 22, 2011, 02:16:01 am
Webmug,


My ebay stm32 will not connect to usb, tried three computers with no luck, drivers won't load,  lsusb in linux doesn't show a device except the pl2303,  I may get the one you have...  then I 'll be asking questions for sure
all the computere see the usb pl2303 serial adapter for terminal use, but not the USB jlink                    hopes are dashed for now
regards,
kb
Linux don't give permissions to open USB devices. Do you use ubuntu?
 "lsusb -v" to get the Product ID and Vendor ID of the programmer. When you see segger you must make a udev rule and restart udev.

Br,
Webmug
Title: Re: Webmug projects
Post by: Login to see usernames on March 22, 2011, 03:46:32 am
Webmug


that's just it, sudo lsusb -v shows the pl2303 but not jlink from segger...   trying to force jlink on win2000 crashes the system, not seen in device manager either


dmesg no help, meerkat shows nothing except pl2303 which I put on ttyUSB0 and works, and my other stuff is listed,


does jlink have alternatives? maybe?

Title: Re: Webmug projects
Post by: Login to see usernames on March 22, 2011, 04:21:07 am
Webmug


that's just it, sudo lsusb -v shows the pl2303 but not jlink from segger...   trying to force jlink on win2000 crashes the system, not seen in device manager either


dmesg no help, meerkat shows nothing except pl2303 which I put on ttyUSB0 and works, and my other stuff is listed,


does jlink have alternatives? maybe?
That's strange, lsusb should list an PID for jlink.

I use ARM-USB-OCD from olimex. Crossworks native jtag. Codesourcery. What IDE are you going to use?

You can also program the stm32 with rs232 ISP
https://github.com/jsnyder/stm32loader (https://github.com/jsnyder/stm32loader)
http://www.micromouseonline.com/blog/2009/05/07/stm32-arm-cortex-bootloader (http://www.micromouseonline.com/blog/2009/05/07/stm32-arm-cortex-bootloader)
http://gostm32.blogspot.com/2010/09/life-on-planet-stm.html (http://gostm32.blogspot.com/2010/09/life-on-planet-stm.html)
If mini-stm32 has rs232 connector connected to stm32 UART1 than ISP can be used over pl2303 converter.

Br,
Webmug