supremeOne

(Verified) 5V relay load short circuit protection test board

Overview

describe

Demand scenario:

When soldering the input power and output interface of the board, sometimes the pins are too thin and I don’t know if they are connected with tin. The only way is to power on first (Boom!!)

When plugged into the computer, it will prompt

This is not computer friendly.

PCB design matters:

1. Choose 6PINS Typec and common Micro interface, two-way input, just choose one when using it.

2. There are three output options for output

1.USB female socket

2. Pin arrangement

3. Solder joints

Different output schemes can be switched according to the usage scenario!

Instructions:

1. Plug in any power supply at the input end (choose one of the two)

2. Click the reset button to energize the output.

The green indicator light appears when the load is not short-circuited.

The load short circuit status is a red indicator light.

Precautions

You can test whether the load has a short circuit, but you cannot test the overcurrent protection of the load!

Netizens who have the conditions can draw a board that can test both short circuit and overcurrent protection (add chicken legs for you!)

The principle of this project is relatively simple

I also copied the schematic drawings from the Internet. In fact, this short circuit test board is also very simple. The components used are all commonly used around me.

The design is also very clever!

You can solder manually according to the schematic below, even without a PCB!

B station video address: https://www.bilibili.com/video/BV1Ty4y1b7aA/

Reference video

Use simple components to DIY a short-circuit protector and easily make a short-circuit automatic power-off device

One trick to achieve single relay short circuit protection

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-06-19 23:01:32

MSP430F5438 DCO frequency multiplication to 8MHZ
1. Platform Description MS430F5438 [cpp] view plain copy // Clock default // FLL clock FLL selects XT1 // Auxiliary clock ACLK selects XT1 32768Hz // Main system clock MCLK selects DCOCLKDIV 1048576Hz
The Ayrshire Orchestra performed passionately, creating a perfect Scottish atmosphere
When the melodious sound of Scottish bagpipes floats over the beautiful mountains, everything is still as peaceful as before. The scattered shepherd's huts dot the green land harmoniously. Here people
[Show sample] Complete the Ti sample application in three steps!
The sample application was very fast this time, mainly for 3 types of chips. I had applied before, so it was very fast to apply again. The following three steps will do it!Step 1: Log in to the TI off
Application of RF Wireless Technology in TPMS
At present, TPMS (tire pressure monitoring system) is mainly divided into two types, one is indirect type and the other is direct type. The direct TPMS system has always been affected by its poor alar
Lostsun, can you help me? If I can't do it, I'll be laid off.puyiyue1980@126.com
I have posted something new, what is the email address to contact me ? puyiyue1980@126.com
The development of GPRS communication has been made, emergency!!!!!!
I use wavecom 24plus module for GPRS communication. After PPP negotiation, UDP data can be sent normally, and the service software can receive it. It can also be received when sending TCP handshake. H

Datasheet More

Circuits More