Simple to build High Power PEMF Therapy Device

Pulsed electromagnetic field therapy (PEMF therapy), also known as low field magnetic stimulation (LFMS) uses electromagnetic fields in an attempt to heal non-union fractures and depression. It can be used to supplement and enhance currently existing healthcare modalities. In addition, PEMF therapy improves sleep, mental focus, and the body’s overall performance by helping the energy output and regeneration of the body’s cells.

Clinical studies have demonstrated that PEMFs are capable of:

In several of my previous videos I have presented you with simple ways to make this type of device without any great knowledge in the field of electronics. Commercial such devices are sold at a price of several hundred to thousands of dollars, so my goal is to make the simple to build and functional device available to more people who can not afford it.

This time I will also show you a simple way to make a High Power PEMF device, which gives a magnetic flux density that is about 10 times stronger than that of previous devices.

There are two options for building such a device:

1. Increase the supply voltage to approximately 50-70V and a current of 3-5A, thereby increasing the ohmic resistance of the Coil.

2. Use a standard power supply from an old PC (12V / 20A), and reduce the ohmic resistance of the coil.

The first way is impractical due to the fact that it uses a non-standard power supply that is difficult to obtain, the schematic diagram would be much more complicated due to the use of two voltage regulators, and also a voltage of 70 Volts and more is potentially dangerous. The second way has none of these disadvantages, it is easier to make and uses components that are much easier to obtain.

The device is very simple to build and contains the following components:

- PWM Signal generator module ZK-PP1K (Also, you can use any of the signal generator modules used in my previous PEMF projects)

The Mosfets are mounted on a sufficiently massive Aluminum cooler without insulation, because the Drain electrodes of each transistor are interconnected. The interconnections should be made with a suitable wires with a cross section of at least 2.5 mm, because a very strong current flows through them.

Special attention should be paid to the construction of the coils because the Mosfet can burn very easily. That's why I made detailed drawings with the dimensions of the coils and the wire. Of course, coils with other dimensions can be made, but two conditions must be met:

When the device is switched on, "Pulse" Led starts flashing at a frequency set by the signal generator. Based on the instructions of many manufacturers of such devices, this frequency should be in the range of 4 to 30 Hz and a duty cycle with a value of 5% to 15%. The potentiometer controls the intensity of the magnetic flux, and its strength is proportional to the intensity of the Led. Now to demonstrate the strength of the magnetic flux, we will do a little experiment. We pass a small permanent magnet through the torus. Under the action of a strong magnetic field, the magnet is cracked by the coil. This effect is used in the device so-called Coil Gun. This device works with very strong currents, so it is necessary to have some kind of protection. In this case that protection is contained in your external power supply, so in case of a short circuit the power supply is automatically switched off.

I am not a medical expert and I can not discuss the effect of the device, although I personally have many positive experiences from using it. I can also say with certainty that low frequency magnetic fields definitely have no negative impact, except in people where it is contraindicated(Pregnancy, Pacemakers, bleeding, Active tuberculosis, Malignancies). In fact, MRI imaging uses magnetic fields that are tens thousands of times stronger than those at PEMF, and as we know this type of diagnostics is completely harmless.

Finally, the device is mounted in a suitable plastic box.