Essen Electronics

Hiren boot cd is Bootable live cd with all tools enough to repair most computer problems.It is an essential tool for every computer technition. You can download latest iso image from here and creat a bootable cd from that                                                   or Create a Hiren boot USB by following procedure 1) download Universal USB Installer here (wait 5 Seconds and click in the yellow button) if the link isn’t available search it in google. 2) create a folder called Hirens Boot 3)Extract or unzip the hiren boot cd .zip to the above folder 4)Run Universal USB Installer 5) In the drop-down menu select the option Hiren’s Boot CD .  click  the button browse   ISO in the  Hirens Boot folder 6). se...

TV Digit-Microscope is a very good tool for micro-view;  it can easily used in many fields.   1. Skin inspection 2. Hair inspection 3. Industrial inspection: PCB, Material 4. Print Industrial 5. Textile industrial 6. Biological inspection 7. Jewelry, Stamp & Collections inspection 8. Education Purpose Product Specification 1. Image Sensor: Color CMOS Sensor: PAL/NTSC 2. Resolution: Same to Monitor display Max Pixel: 2M (1600*1200) 3. Controller: High Speed DSP (Driver Free, SOC) 4. Focus Range: Manual Focus from 10 mm ~ Infinite 5. Video Capture Resolution: PAL / NTSC 6. Build-in light source: 4 LED 60000 m LUX 7. Frame Rate: Max 30 FPS (Frames per Second) - Under 600 LUX Brightness 8. Life View: 30 frame per second 9. Magnification Ratio: 25X ~ 400X (Manual) Based on 15" LCD Panel 11. Interface: Video Port   12. Dimension: 112 mm (L) X 33 mm (R)

 In my Electronic repair job I found normal multimeter is somewhat limited  in certain area. so special tools are needed for saving  a lot of time  Ring tester is one of this kind .helping me to check small hi Q inductors SMPS transformer, TV Deflection coils ,LOT ,line driver transformer and almost any inductor working on hi frequency.Normal multimeter can only identify a open coil ,but not a shorted windings.  I found some commercial available ring tester. but it is not available in local shops of my area.also it seems priced high. So  I decided to make a ring tester of my own. Below is the one I successfully made from the junk box components. I found it very useful. and now it is one of my best test tool collection. Two Ic's, few LED's ,one plastic container and few resistors  made this wonderful tool. If we test it with primary of SMPS transformer or LOT windings of a good one shows all its LEDs will light. depending on the inductive reactantce...