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salzahrah
Starting Member
USA
19 Posts |
 Posted - 05/11/2009 : 11:37:25 PM
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Hey i think Ive burned out my board because whenever i attach the power batteries 1. Coil doesn't turn on. 2. Neon bulb doesn't go off when i take off the charging battery
How can i fix this? I think this may be because i used the circuit without a charging battery and put in 24 volts =/
How can i fix this and i have heard about burning out your transistor. How can you tell if u burnt out your transistor
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vesperhbt
Advanced Member
USA
445 Posts |
Posted - 06/11/2009 : 10:09:26 AM
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In my experiences I have found that once you have a large failure in the circuit it is best to replace all major components at the least the transistor and the pot, check the diodes as well they can become shorted if the voltage was high enough. Any discolored parts need to be replaced as well.
Check the ohms on the coil to make sure it did not short out as well. I have had this happen, the ohms should be 450 to 500 give or take for a 12 volt system. I set mine at 455.
As for testing I think CW can explain this better then I he has a way with words.
If your coil is getting hot it may be shorted as well.
I will try to answer better tomorrow if you still need help.
vesperhbt
"The power to change the world" |
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comwarrior
Moderator
United Kingdom
477 Posts |
Posted - 06/11/2009 : 11:58:08 AM
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hi salz,
if you have a multimeter that has a transister test socket then you can test it in the socket.
i have had a transister explode on me befor now, and a piece decided to embed itself in my arm...
So my first piece of advice is to use some sort of fuse to circuit overload breaker to prevent a sudden surge of power going through the transister. on my build 3 set of video's i mention that i have a battery box with two 5 amps breakers and a set of 100mA thermal fuses. In the last video i did on my bedini turbo boost you see a 1.1A thermal fuse trip @ 1.9A and cut power to my project...
The thermal fuses i use will auto reset once they cool down, which is aproximatly 10 seconds.
I must ask the reason for using 24 volts this seems a high voltage to be using for a beginner
Diagnosing your system...
First off you have a neo protecting your charge output so remove the charge battery.
Connect the primary battery.
touch the transister with your finger, if it's getting warm or VERY HOT then immediatly disconnect the primary battery because your transister is dead.
If the transister does not get hot use a multimeter and check their is 24V ish on the transisters collecter relitive to primary battery negative.
if their is 24v... atach a multimeter inline with the primary battery to measure curent flow.
Turn your POT down to it's minimum setting and give your wheel a good flick.
If you do get curent flowing then it's not a transister fault
If you dont get current flow then take a 1.5 volt battery and connect it's negative to the transisters emitter (or primary battery negative) and briefly (for one second) touch the 1.5V battery's positive to the transisters base. You should get curent draw from the primary battery. If you don't the transister is dead. If you do get current draw then it's most likely a coil problem.
if you don't grasp where i'm going with that, then do the tests and post results here and i'll run through it in ore detail...
CW
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Generator Systems Moderator
"Energy can not be created nor distroyed, it can only be changed into other forms" - so lets do some changing!
"Every Action has an equal and opposite re-action" - Why not use the re-action to create an additional action?
95% efficiency, I dare you to do better!
http://www.youtube.com/user/comwarrior69 |
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vesperhbt
Advanced Member
USA
445 Posts |
Posted - 06/11/2009 : 10:35:03 PM
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Cool yes as I said a way with words.
I recommend that if you are going to be doing allot of playing to invest into a very good meter at least one for part testing and track down like the one CW refers to with a transistor tester built into the unit. This is because it is the heart of the system.
To check for the power voltage and amps and draw current all can be checked by cheep meters since it does not have to be as exact so buy 5 or 6 cheep meters and calibrate them to a load then tape the calculation to the back of the meter for reference if they test different that way in the end calculation you can start from a true "0".
Harbor freight tools has great cheep meters and there on the web for reference. www.harborfreighttools.com
I hope that was not to confusing?
vesperhbt
"The power to change the world"
www.youtube.com/vesperhbtmotor |
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salzahrah
Starting Member
USA
19 Posts |
Posted - 08/11/2009 : 04:16:36 AM
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Sweeeet thanks for the help guys im going to try it out on monday. Hopefully ill know where the problem is coming from. And i think i burned out my coil maybe cause i put in 24 volts of AC into it once and that thing got hotter than fire and was vibrating like a laundry machine. But when i attached the coil straight to a weaker battery the coil still made a magnetic field so i doubt that is the problem.
Either way im going to check in two days, thanks for the help!!! |
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vesperhbt
Advanced Member
USA
445 Posts |
Posted - 08/11/2009 : 10:58:13 AM
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Well no problem at all keep me posted as to your findings.
vesperhbt
"The power to change the world"
www.youtube.com/vesperhbtmotor |
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BiDaDiKuNuKu
Advanced Member
Netherlands
333 Posts |
Posted - 08/11/2009 : 1:13:19 PM
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ima no expert on this but ur coil shouldnt get hot while 24v ac is going thru it...??
check if u dont have a short somewhere...and really take ur time with the connections...
connections have gaven me some trouble in the past as well...
hope u get it fix...:))
Peace!
V2DAY
http://www.youtube.com/user/BiDaDiKuNuKu
"1 often meets his destiny on tha road he takes 2 avoid it" |
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vesperhbt
Advanced Member
USA
445 Posts |
Posted - 09/11/2009 : 02:20:57 AM
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A coil getting warm is normal if you are getting close to it's threshold but Hot is never normal. Also using AC just means you will be 60 pulse per second so yes a vibration is what you would feel. All normal
Getting Hot means there is something shorting out in the coil. It is possible to have a bur on the coating on the wire and this is shorting out on the other wrappings.Best thing to do to check this is. Take an LED and a resister and a 9 volt battery use the + from the battery through the trigger side of the coil and to the LED through the resister then from the - of the LED to the - of the battery. The LED should come on. ( normal )
Check the run side of your coil Start to red on meter and Den to the black on the meter. there should be NO voltage in the coil. If there is there is a problem with the coil. ( Do not pulse the coil for this test.
Now if there is no voltage the pulse the trigger to battery and watch your meter you will see the voltage Spike for every pulse. if this happens then the coil is good. if not then the coil is bad.
Hope this helps
vesperhbt
"The power to change the world"
www.youtube.com/vesperhbtmotor |
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Burned out circuit
