How can I design a circuit that indicates when a short circuit or overload current occurs?
Detect the short circuit by measuring the circuit current and comparing it with a known reference current or the system’s specified current range [#21660220][#21660223] If the measured current increases above the reference, feed that difference to an indicator to show an overload/short condition [#21660223] If current measurement is not practical, compare the voltage instead, because when a short circuit occurs the voltage difference should be zero [#21660225] You can route that voltage through a comparator/op-amp or use a microcontroller to sense the condition and trigger an alarm or other indicating device [#21660225]
AI summary based on the discussion. May contain errors.
short circuit occurs when the positive and negative terminals of a battery are connected together with a low-resistance conductor, With low resistance in the connection, a high current exists, causing the cell to deliver a large amount of energy in a short time. i need to design a circuit based on that information.
Which literally translated to English as: …. Rizal Mohd. Janah said the incident was noticed by a staff who saw the smoke coming from the main switch before the fire reached the roof.
Based on the article given, you are required to investigate the possible causes that triggered the incident. At the end of the investigation, you should produce a complete report on the cause and how to prevent it from happening again.
do you mean i need to measure the current to prove there is a short circuit? I indicate the short circuit when the circuit are having over load current. then, how to show the circuit are having over load current???
by chance can U try using a comparator (op amp) and compare the current levels?? I mean U know the specification of current in ur system , so why not compare the current in the ckt and the current U give as reference? and yes if there is an increase feedback that current to indicate that there is an increase .( this is only for indication)
based on your explanation i understand that i need to make a comparison between reference current and the current in the circuit. but i need more explanation about reference current. what do you mean by reference current??
Suggesting voltage comparison or MCU alarm for short detection
I guess you know the current specifications in ur system!! I mean while you were designing the system you must have also checked upon the amperes range right? Okay If not current , cant you try comparing voltages ??as when there is a short circuit the voltage differnce should be zero , so route that voltage and compare it with a refernce voltage( I am not guessing on the refernce voltage as what sought of a circuit you are working on is not know by me) and feedback that amplication to the source or any indicating device!!! (this is in pure hardware terms)!! If not you could use a microcontroller to sense it and strike an alarm!!!
The discussion focuses on designing a circuit to indicate the presence of a short circuit by detecting abnormal current conditions. A short circuit is characterized by a low-resistance connection between positive and negative terminals, causing a high current flow. The suggested approach involves measuring the current in the circuit and comparing it to a predefined reference current that represents normal operating conditions. This comparison can be implemented using an operational amplifier configured as a comparator to detect when the current exceeds the safe threshold, thereby triggering an indicator. Alternatively, voltage comparison methods can be used, as a short circuit typically results in a near-zero voltage difference across certain points. For more advanced solutions, a microcontroller can be employed to sense current or voltage levels and activate an alarm or indicator accordingly. The key design challenge is establishing an appropriate reference current or voltage level based on the system specifications to reliably detect overload or short circuit conditions. AI summary based on the discussion. May contain errors.
