Hi,
I'm a enthusiast of electronics, I always liked but never pursued this career.
A few months ago, I brought a small water pump for a 5 gallon vessel. To take water out without too much effort.
All the suddenly it stops work. I think it is the lithium battery. I'm sure it´s a chinese appliance, and I don't trust those batteries too much.
I would like to eliminate the battery at once and let it plugged in all the time.
I found a instructable where the guy uses a LM-317T voltage regulator and 2 resistors (a 5k on the adjust pin and a 250 on the out pin) to eliminate 4 type D batteries. I'm assuming that my battery is a 3.7v and the guy total voltage is 6. 4x1.5v.
Can anyone help me on which resistor should I use in my case? Or at least how do I calculate the apropriate one. I don't even know how to search for this topic.
Thanks a lot.
I'm a enthusiast of electronics, I always liked but never pursued this career.
A few months ago, I brought a small water pump for a 5 gallon vessel. To take water out without too much effort.
All the suddenly it stops work. I think it is the lithium battery. I'm sure it´s a chinese appliance, and I don't trust those batteries too much.
I would like to eliminate the battery at once and let it plugged in all the time.
I found a instructable where the guy uses a LM-317T voltage regulator and 2 resistors (a 5k on the adjust pin and a 250 on the out pin) to eliminate 4 type D batteries. I'm assuming that my battery is a 3.7v and the guy total voltage is 6. 4x1.5v.
Can anyone help me on which resistor should I use in my case? Or at least how do I calculate the apropriate one. I don't even know how to search for this topic.
Thanks a lot.