#TITLE_ALTERNATIVE#

• Main Author: SAM PRATIWI (NIM 13202005), ASTU
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/10053
• Institution: Institut Teknologi Bandung

<p align="justify">Pain management using electrical pulse has nowadays been known widely throughout the world and has been used in many hospitals. One of many types of the applicable current characteristic is TENS (transcutaneos electrical nerve stimulation) which gives current to maximum 50mA form 10Hz to 250Hz. It also provides many types of waveforms which suits to particular type of pain. Many theory explain how TENS works, but the most popular is "Pain Gate" theory proposed by Melzack and Walls, which illustrates the analgesic effects created by TENS pulse.<p align="justify"><p>TENS therapy has direct contact with the patient through a pair of electrodes. In order to meet the medical standard requirements, a structure safety circuit has to be build so well that any kind of burn injury to the patient can be avoided. This report describes such a safety system integrated in TENS unit.<p align="justify"><p>The safety system being built here simply prevent burn wound that may caused by improper placement of electrodes. If in this state a particular amount of current is delivered to the skin it will cause an inconvenience to the patient, or even serious burn. The basic mechanism of this system is to check whether the electrodes are well attached to the skin or not during the absence of current.<p align="justify"><p>This circuit is able to work well for current up to maximum 50mA and frequency up to 250Hz.