Dec 23, 2012 #1 Y yviswanathbe Full Member level 4 Joined Jun 14, 2007 Messages 221 Helped 10 Reputation 20 Reaction score 6 Trophy points 1,298 Activity points 3,066 Hi, I need a circuit of LED indication. My Voltage source(Battery) is 10 to 160Vdc. When ever the source is connected i need to show a LED for indication. Can any body suggest me any idea. Thanks and Regards, Viswanath
Hi, I need a circuit of LED indication. My Voltage source(Battery) is 10 to 160Vdc. When ever the source is connected i need to show a LED for indication. Can any body suggest me any idea. Thanks and Regards, Viswanath
Dec 23, 2012 #2 Tahmid Advanced Member level 6 Joined Jun 17, 2008 Messages 4,756 Helped 1,798 Reputation 3,588 Reaction score 1,656 Trophy points 1,413 Location Berkeley, California Activity points 30,586 You can use something similar to this: Remember to take into consideration the power loss in the resistor and in the transistor. Hope this helps. Tahmid.
You can use something similar to this: Remember to take into consideration the power loss in the resistor and in the transistor. Hope this helps. Tahmid.
Dec 24, 2012 #3 Y yviswanathbe Full Member level 4 Joined Jun 14, 2007 Messages 221 Helped 10 Reputation 20 Reaction score 6 Trophy points 1,298 Activity points 3,066 Hi Tahmid, Thanks for sharing the circuit. I have done in a different way.But my circuit needs auxiliary power supply. When i try to derive it from the battery, the circuit draws more current. that shouldn't happen in my case. View attachment Battewry Indication.bmp Your circuit seems to be working perfect. I tried in simulation. Thanks again for the circuit. Regards, Viswanath
Hi Tahmid, Thanks for sharing the circuit. I have done in a different way.But my circuit needs auxiliary power supply. When i try to derive it from the battery, the circuit draws more current. that shouldn't happen in my case. View attachment Battewry Indication.bmp Your circuit seems to be working perfect. I tried in simulation. Thanks again for the circuit. Regards, Viswanath