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Does it has Bad side-effects to human body? (Health related electronics)

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This is not a good thing to mess around with unless you're willing to take risks and know what you're doing, electrical muscle stimulation is not the same as true natural movement and can if done improperly damage muscles/nerves.
 
The circuit was designed by someone who knows nothing about electronics:

1) The protection diode is in the wrong location. When the transistors conduct then the transformer is energized and the diode is reverse-biased so it does nothing. When the transistors turn off then a NEGATIVE few hundred volts zaps the transistors and the LED. Again, the diode is reverse-biased so it does nothing.

2) With a supply of only 3V then the output current from the Cmos 555 is almost nothing so the transformer will be barely driven.
 
Electronic muscle stimulators have been developed to assist recovery (reanimation) of muscles, mainly of extremes (arms and legs) after a long period of bandaging.

They should be used by qualified and specially trained personnel only to expedite muscle activities after bandage removal - possibly under medical supervision.

Under no circumstances should the output AC exceed the safe value of 39Vpp at moderate currents of no more than 25mA!

(The example circuit doesn't even produce AC, but pulsing DC - if at all.)

Higher voltages and/or currents at low frequencies are generally used for torture and electrocution. :mad:

It must be a fairy tale that belly muscles "stimulated" by electric shock waves help to burn off fat!

Yet, a better and healthier way is "working" the fat off by muscle training.
You might smell like an animal after such training, but there are ways to get rid of that - I call it shower or full bath!

A good side effect of that method is increase of body power - which can be used for population policy purposes. ;)


Boncuk
 
nah bro, that's what da led iz for.
The LED is forward biased and lights when the transistors turn on. The LED is reverse biased when the inductance of the transformer creates negative a few hundred volts. The MAXIMUM reverse voltage for most LEDs is only 5V, not a few hundred volts.

If the diode was connected properly across the transformer then the maximum reverse voltage is only -0.7V.

A Chinese guy advertised his electronic muscle twitcher on TV for losing fat and gaining strength. His fraud caused him to get a huge fine from the government and to stop telling lies on TV.
 
in the late 80's i built a prototype of something similar, but i used a preassembled bias oscillator for a tape deck and an astable multi to pulse the power. it created pulses of less than 1mA@100V (DC... the 250khz signal was passed through a diode stack), and was attached to the skin with contact pads and gel. it was just enough current to get the muscle to contract, but was not painful. this was well before these devices became popular.
 
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