Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
I need the circuit to amplify the output current to 150mAh.
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
Knowing that 3.7V is enough voltage to heat the coil I figured increasing the amps
would get the coil hot enough.
Upon further research I found a Nichrome wire calculator.
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
It is a 3.7V 150mAh.
Fully charged the multimeter read 4.35V when the coil was connected directly to the battery the V dropped and stabilized around 3.55V.
I will also note that the Ohm setting options on my multimeter are 200 ohm, 2000 ohm, 20 kohm, 200, kohm, 2000 kohm. The 1.8 ohm reading I received was while the dial was turned to 200 ohm. Is that the appropriate setting or is my decimal in the wrong place.
Re: Current Amplifier Circuit with low input current
I never knew!Not all 3.7 150 mAh cells are created equal. Details of the cell design and construction will vary depending on the intended use. Cells designed for very high discharge rates tend to have electrodes with increased surface area and are constructed to minimize internal resistance.
That is about an 18% voltage drop. Looking at the discharge curve charts posted earlier, that is substantially more of a drop than the 5C line on the chart. So a >10C discharge rate does not seem out of the question for the cell you are using.
That would be the right setting for your meter. Although you are extreme low end of the measurement range. So unless your meter has been recently calibrated, some error is possible. And even a small change in the reading could make a significant difference in the calculated current.
What you need to figure out is how much current is required to get your coil hot enough. Then use Ohm's Law to figure out what voltage you need to sustain to make that happen.
Re: Current Amplifier Circuit with low input current
I have difficulty understanding the C ratings of batteries.
Re: Current Amplifier Circuit with low input current
Re: Current Amplifier Circuit with low input current
So I guess the question now is how can I produce 1850mA from these 30mA batteries.
The CG-425A has a maximum continues discharge current of 60mA(2C)