With Instructables you can share what you make with the world and tap into an ever-growing community of creative experts.
share what you made with text, photos, video, and files
gather your favorite instructables together
I design and test high power equipment that uses large SCRs (silicon controlled rectifiers). Sometimes one will go out. I use 6 in a three phase brid...
An SCR is a Silicon Controlled Rectifier. They are used in power supplies, welders, inverters and other equipment for controlling power. The one belo...
To test the SCR, you need to connect a power source to the device. The anode connects to positive and the Cathode connects to negative. The flashlight...
You will need to bring out three wires at the end of the flashlight. Start by drilling a hole just big enough for your wires. I used a Yellow, Red and...
Feed three wires about 18 to 24 inches long through the hole at the end of the flashlight. Make them different colors like I did and attach alligator...
Carefully adjust the lengths of the wires by pulling on the other ends. Trim the wires and attach alligator clips. Leave a little slack for screwing i...
Test the device by bringing together the red or white lead (positive) to the yellow lead (negative) together. The bulb should light. Now go find an S...
Clip the red positive lead to the SCR's Anode.
Now connect the yellow (negative) lead to the Cathode. The flashlight bulb should remain off. If it comes on, you have a shorted SCR.
Touch the white (positive) clip to the gate lead. The bulb should light up and remain lit even when you remove the connection to the gate. If it doe...
Remember to turn off all power to the equipment and lock out, tag out (LOTO) before testing.You can test SCRs in a 3 phase bridge without removing th...
Now test the other halve of the bridge. Connect the yellow negative clip to the positive bridge output bus bar at the left. Connect the red positive c...
SCR (Silicon-Controlled Rectifie)by dhruvil_patel
Simple Computer Power Supply Testerby cwebsterlusk
How to Test LEDs for Functionality, Color, Brightness and Uniformityby vpi
Arduino Uno R3 Battery Testerby azabonik
USB Mega Flashlightby EmmettO
Fun Led Checker Testerby Geek07Boy
POCKET Petite Battery Testerby iceng
led tester/flashlightby andrewmystery
All You Need to Know About LEDsby theedisoneffect
Pimped Out LED Car Sound Systemby mcguyverzboss
Download our new apps for iOS, Android and Windows 8!
© 2014 Autodesk, Inc.
By clicking "Create Account" you are indicating that you have read and agree to the Terms of service.
Already a member? Login »
Enter the email associated with your account and we will send you your username and a temporary password.
Not a member? Sign Up »