ELECTRONICS SOLUTION: Protection

PING Ultrasonic Distance Sensor and Applications

PING ultrasonic distance sensor is a sensor 40 kHz Parallax production is widely used for applications / robot contest. Advantages of this sensor is that only requires 1 signal (SIG), in addition to the 5V and ground lines.

Learn to Make USBasp is Easy

USB Downloader was made by Thomas Fischl. He used the the USB driver with AVR that is being developed by Objective Development GmbH. USBasp consists of ATmega48 / 8 and a few passive components without requiring the other driver components. USBasp has several features such as: Can work on the Linux operating system, Mac OS X and Windows..

Symmetric Power Supply +35V and -35V Project

A symmetric power supply is needed when we make project about amplifier. Like an amplifier in sound system, it needs a symmetric power supply to operated. Here, we will construct a simple power supply circuit which result the output voltage is +35V and -35V.

Minimum System of ATMEGA8

ATmega8 is a low power 8-bit microcontroller with RISC architecture. This microcontroller can execute a command dalah one period a clock for each instruction. Some features of the ATmega8 are as follows: 8 Kbyte Flash Program, 512 Kbyte EEPROM, 1 Kbyte SRAM, 2 8-bit timers and one 16 bit timer, Analog to digital converter, USART, analog comparator, Two wire interface (I2C)

Introduction Parallel and Serial (USB) Downloader

To flash the program into the AVR uC requires an equipment downloader. There are two types downloader is a parallel and serial downloader. Parallel downloader requires a computer that has a parallel port as DB25. Serial downloader can be used on any computer that has a serial port like a usb port. Because now it no longer produced a computer that has a parallel port then we should make a serial downloader (usb downloader),..

Showing posts with label Protection. Show all posts

Saturday, 7 July 2012

Power Supply Short Circuit Protection

11:14

Unknown

1 comment

Power Supply Short Circuit Protection

Description

This circuit designed to be used with:
0-30 Vdc Stabilized Power Supply With Current Control 0.002-3 A

Components values are shown in shematic.

Connect 741 +Vcc to D1 anode in main circuit
Connect 741 -Vcc to D3 catode in main circuit
U1 needs a 5v +Vcc connect pin 4 of U1 to 5v

Please note that +Vcc is above absolute maximum ratings of 741 which are +/- 22V, this may cause damage to OPAMP. You may need to add a LM7805 to power OPAMP. U1 needs at least 5v +Vcc.

Usage

- Power ON power supply then press START button to connect outputs to power supply.
- If output is shorted the relay disconnects output from power supply.
- Fix the short circuit and then press START again to connect output to power supply.

Read more »