ElectricGod
10 MW
Gauss and magnet testers:
This post is my guass meters. A linear hall with no magnet present outputs about 2.5 volts. With an N50 magnet North pole, the hall outputs .78 volts. The South pole of an N50 outputs 4.3 volts. You can test which magnet pole is which based on which way the voltage swings. Based on how much the voltage swings the center point voltage will tell you how strong a magnet is. You will want to know the specs in the halls data sheet so that you can use the output voltage to calculate the magnetic strength.
This was my original magnet tester. It stayed whole for a couple of weeks before I built a new one. I got some linear halls because the hall in a throttle died. I decided to mess around and see what else I could do with a linear hall. This is a 150mah 1S lipo battery and a 5 volt boost converter/charger board and a linear hall. The halls output gets monitored by my DMM. The fact that I needed an external meter was a bit problematic and made it NOT portable.
This is version 2 of the guass meter. It uses a re-purposed USB watt meter that can also measure a secondary voltage source. V+ is the output from the 5 volt boost converter and D+ is the linear hall output. It uses the same lipo charge/boost board, but now has a 350mah LIPO battery. With the USB meter on board it's 100% portable. Just about all the parts I found on ebay and spent less than $20 in making it. It incorporates a tiny slider switch to turn it off and all voltages are externally measurable if desired. It charges via a micro USB port. THe battery and charge/boost board are individually wrapped in kapton and then double sided foam tape hold them together. The USB meter is stuck on top of that with more 2X tape and then the whole thin is wrapped again in kapton. Then the USB port and 2 pin connector for hall are hot glued in place. The whole thing is then covered in clear heat shrink.
The long set of pins are 5 volts from the boost converter. The short set are the hall output.
This post is my guass meters. A linear hall with no magnet present outputs about 2.5 volts. With an N50 magnet North pole, the hall outputs .78 volts. The South pole of an N50 outputs 4.3 volts. You can test which magnet pole is which based on which way the voltage swings. Based on how much the voltage swings the center point voltage will tell you how strong a magnet is. You will want to know the specs in the halls data sheet so that you can use the output voltage to calculate the magnetic strength.
This was my original magnet tester. It stayed whole for a couple of weeks before I built a new one. I got some linear halls because the hall in a throttle died. I decided to mess around and see what else I could do with a linear hall. This is a 150mah 1S lipo battery and a 5 volt boost converter/charger board and a linear hall. The halls output gets monitored by my DMM. The fact that I needed an external meter was a bit problematic and made it NOT portable.
This is version 2 of the guass meter. It uses a re-purposed USB watt meter that can also measure a secondary voltage source. V+ is the output from the 5 volt boost converter and D+ is the linear hall output. It uses the same lipo charge/boost board, but now has a 350mah LIPO battery. With the USB meter on board it's 100% portable. Just about all the parts I found on ebay and spent less than $20 in making it. It incorporates a tiny slider switch to turn it off and all voltages are externally measurable if desired. It charges via a micro USB port. THe battery and charge/boost board are individually wrapped in kapton and then double sided foam tape hold them together. The USB meter is stuck on top of that with more 2X tape and then the whole thin is wrapped again in kapton. Then the USB port and 2 pin connector for hall are hot glued in place. The whole thing is then covered in clear heat shrink.
The long set of pins are 5 volts from the boost converter. The short set are the hall output.