cheezey8 said:Is it possible to build an adjustable transformer that can take 110/120 and dial it all the way down to 1 volt? I'd like to build one if possible to aid in physical development so it's very important to be able to take it as low as possible in the beginning. I'd like it to have 2 electrodes as well.
berkeman said:The variable transformer search term is "variac". That will give you info on a variable autotransformer.
However, it sounds like you would like to use this for medical experimentation purposes, which would be totally inappropriate and dangerous if you use a simple variac. Could you please tell us more about the application, and about your background in EE and medical electronics? Are you familiar with the guidelines in UL 544?
skeptic2 said:Once an electrode breaks the surface of the skin the internal resistance of the body is quite low. Not only do you need to use low voltages but the electrodes also need to be current limited.
Have you considered your potential liability if something were to go wrong? How would a jury react to your statement, "I have absolutely no background in EE or Medical Electronics. The only electrical training I've had is on the job electrical installation. Nothing major, secondary electrical. If it helps, I'm very mechanical."
vk6kro said:You may be looking for low voltage power supplies. These give you safe DC from 0 to 15 volts. There are plenty of these around if you look on Google.
Another device is the multi-output wall wart.
These give you DC in a range of outputs like 4.5 V, 6 V, 7.5 V, 9 V, 12 V etc.
They are intended to run electronic equipment.
At least these devices are isolated from the 120 V supply, but I doubt the safety of applying even these low voltages to needles inserted in flesh. Ouch.
cheezey8 said:I'm going to check out both options. Thank you.
Lol I'm not going to issue any voltage to anything in the skin. I just used the term acupuncture for the meridian lines and points.
A transformer is an electrical device that is used to transfer electrical energy from one circuit to another through the process of electromagnetic induction. It consists of two or more coils of insulated wire called "windings". When an alternating current (AC) is passed through one winding, it creates a changing magnetic field which induces a voltage in the other winding. This allows for the conversion of high voltage to low voltage or vice versa.
A 110V-1V transformer is used to step down the voltage from 110V to 1V. This is useful for applications that require a lower voltage, such as small electronic devices or low power circuits. It also helps to isolate the circuit from the high voltage source, providing safety and protection.
The two electrodes in this transformer are used to connect the primary and secondary windings. The primary winding is connected to the power source and the secondary winding is connected to the load. The electrodes allow for the transfer of energy between the two windings.
Yes, it is possible to build this transformer yourself with the right tools and knowledge. However, it is important to note that working with electricity can be dangerous and should only be done by those with proper training and safety precautions in place.
When building this transformer, it is important to always work with insulated tools and wear protective gear such as gloves and goggles. Make sure to disconnect the power source before working on the transformer and use a multimeter to check for any potential hazards. It is also important to follow proper wiring and insulation techniques to prevent any electrical accidents.