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Just reading your post mentioning your wife and DNR, I was told that last year about my mum, but now just read that you have lost your dear wife which has made me very sad , just remembering also my mum passed away so quickly. I wish I could give you words of help, but life is so cruel at time, just try to remember all the good times that you have shared together, and I do believe you will meet again.
As a newbie I dont know many of you, but i read all the blogs. I know how you must feel after losing my wife at a tender age of 38. My thought are with you.
You are so kind everyone. Thank you all. Yes recalling happy times does help. Happier. News G Granddaughter MATILDA delivered by C Section. Midnight Friday. Mum and babe doing well. 9llbs 11ozs 👍👍
Thanks luv you all. Btw doug did you ever reply to my query re voltage dropping. 15 v raw down to whatever needed for charging 7.4v (7.5/6 )???👍 What resistor would I need?
Hi John, Yes, two or three times actually. I wanted to know the current the charger is rated for. Should be on a label or embossed on the case somewhere. Given that the calculation is easy. V=I*R --> R=V/I Given an initial charging voltage of approx 7.4 +10% = 8.14V and a charge current of 0.5A; V=15-8.14 --> 6.86 R=6.86/0.5 --> 13.72Ω so you need a 12 or 15Ω resistor. P=I*V = 0.5*6.86 --> 3.43W. So you need at least a 5W resistor. A ceramic resistor if there is enough space. Alles klar Herr Kommissar? 😉 Cheers, Doug 😎
Young at heart - slightly older in other places 😉 Cheers Doug
Thanks Doug but can't see a current rating. Just volts in and out. I thought about 10 Ohms but your numbers are right . Is 5 amps a bit high. It's only for up to 4 Nimh AA cells after all or are you playing safe? Sorry I don't know how I missed previous answers. A similar one shows 400 Mah. |But thinking back I think the original was 7.2 v @w250 Mah. I only think though.
Hi John, that's 0.5A (or 500mA) not 5A! Do you mean 400mAH (which is battery capacity) or 400mA current? If 400mA charge current then use the 15Ohm resistor. If the battery capacity was 400mAh then using the C/10 rule, i.e. 40mA charge current you would need a 150Ohm resistor. And charge for about 12 hours. For a 250mAh battery probably a 180 or 220Ohm resistor. Any chance of a photo showing any and all markings on the 'Wart'? Off to 'Bedfordshire now, I'll do some proper calcs tomorrow. All the best, Doug 😎
Young at heart - slightly older in other places 😉 Cheers Doug
Doug they don't say what Mah is for. just the figure alongside the voltage. A 1000 and a100 Ohm both too big so will try 10 to 20 range. thanks Doug 👍👍 I can't do pics. Not equipped.
8th Oct 2018 05:20
