| T O P I C R E V I E W |
| drilon |
Posted - Mar 11 2007 : 12:00:48 AM
Moderator pls help me. How does this circuit work, especially the function of the SCR and TRIAC? please help me. Your Answer will be very much aprreciated. |
| 15 L A T E S T R E P L I E S (Newest First) |
| Aaron Cake |
Posted - Mar 31 2012 : 10:18:54 AM
You can use that transformer.
There is no PCB available. If there was a PCB pattern, it would already be on the page with the circuit. |
| artronic22 |
Posted - Mar 30 2012 : 02:34:15 AM
Loooking for PCB please help artronic22@hotmail.com |
| fahri |
Posted - Mar 28 2012 : 03:34:22 AM
Hi, Thank you for this useful circuit, I wonder if i can use 12V 2,5A transformer as T1 ??
http://www.ebay.com/itm/30VA-E-Square-Transformer-IN-220V-OUT-0-12V-/110850216546?pt=LH_DefaultDomain_0&hash=item19cf301262#ht_825wt_877
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| Aaron Cake |
Posted - Feb 18 2012 : 10:54:16 AM
Disconnect everything after D1. What is the voltage?
If it's less than 12V then your tansformer is wrong. Maybe you have a 12V center tapped transformer and you've connected the circuit to the center tap? |
| Zogpy |
Posted - Feb 13 2012 : 5:39:54 PM
Thanks a lot for your reply, I went to another store & bought some parts with the exact values BT136, 82k ohm 3w, 330 ohm, 100 ohm pot,as stated in your circuit, but no chance of finding the brx49, is there any way of getting the MCR100-6 to work.
Also the output is the same less than 7v. can you tell me how to check on this circuit talking various measures at different points to determine where is the problem, I measured the voltage after D1 it's less than 6v, although T1 in my case outputs 12v Ac 3A! why is that ? & how to fix this plz help, I really would appreciate it. |
| Aaron Cake |
Posted - Feb 12 2012 : 10:24:57 AM
It doesn't work because you've altered a bunch of components and values. Build the circuit as shown on my site and it will work. |
| Zogpy |
Posted - Feb 11 2012 : 5:29:35 PM
Hi Aaron, I have a problem with this circuit, I only get 7-8 volts output. The Led is always on I need your help, I could not find the exact values for some parts like the Triac, I used BT137, 390 ohms resistors instead of the 330, 75k ohm 2w resistors instead of 82k, 221 ohm pot, MCR100-6 instead of the Brx49. I feel so disappointed, & I wish to get this charger to work. can you plz tell me what might be causing my problem.
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| eddiegeer2001 |
Posted - Nov 12 2011 : 11:35:38 AM
I set the pot to midway and then turned on the charger. The led lit up and then it went off when I connected a battery.
I measured the battery and when it read 13.8 volts I turned the pot. The led would not light up. I turned the pot both ways.
Eddie |
| Aaron Cake |
Posted - Nov 12 2011 : 10:24:45 AM
Did you go through the procedure to calibrate R3? |
| eddiegeer2001 |
Posted - Nov 10 2011 : 9:39:18 PM
The led lights up when I first turn on the charger. When I connect the battery the led goes off.
The battery reads around 12.9 volts when I first turn on the charger and then increases to around 14.4 volts.
The voltage will then slowly drop. I turned off the charger when the battery read around 13.8 volts.
The led never comes on when the battery is connected.
What could be the problem?
Thanks for any help.
Eddie
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| rider21 |
Posted - Aug 29 2011 : 01:48:58 AM
ok..thanx........ |
| pebe |
Posted - Aug 28 2011 : 03:36:01 AM
Like I said. It's for charging lead acid batteries.
Lithium batteries are a totally different breed and need to have a very sophisticated charger.
So,no. You cannot charge a lithium battery wih it. |
| rider21 |
Posted - Aug 28 2011 : 12:00:50 AM
mr pebe...kindly help me....thank you..
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| rider21 |
Posted - Aug 27 2011 : 11:47:19 PM
is this circuit not applicable for a 9volts lithium battery? |
| rider21 |
Posted - Aug 27 2011 : 11:45:16 PM
ok...but i can i use a lithium battery instead?if i can...what components must i change sir?
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