TENS Versions
Initial Design
Components Required
| Name | Cost |
|---|---|
| ESP32/Arduino | 500/- |
| Transformer | 250/- |
| MOSFET | 15/- |
| Dot PCB | 50/- |
| 3.7 V Battery | 70/- |
| DC up Converter | 90/- or 70/- |
| Resistors | 5/- |
| miscellaneous | 20/- |
| Battery Management System |
40/- |
| Total | 1040/- |
Version 0.1.0
Version 1 -> 0.1.0 in this version i'm planning to use the monostable followed by astable , switch , inverter
graph LR
A[Monostobele] -- Reset Pin--> B[Astable] -->C[Mosfet SWITCH] --> D[Inverter]
Monostable Multivibrator: 555
The monostable will provide a varying duration , it is best not exceed the duration morethan 10 second and less than one second
Astable Multivibrator: 555 ,
The Astable Multivibrator is used to control the turning on and turning of of the inverter , in theory the inverter will run only on the frequency which is able to work , which is the same frequency as the oscillation of the feedback transistor , so this Astable Multivibrator is not actually controlling the output frequency of the transformer which is high voltage , but rather turning on and of the transformer , which simulates the a low frequency turning on and off.
Inverter Circuit: SMPS Transformer
Here i have used a high frequency transformer from the Mosquito Bat
Duration Circuit
Design
Required Duration :
Using this relation to obtain 1seconds to 30 seconds duration
we can use 100k pot to adjust an obtain duration 30sec and 1 sec
Astable Multivibrator
Design
Required Freq :
| Components | Value |
|---|---|
| Rb | 200k |
| Transformer | x:x |