Your transistor is backwards. IEE Floating Point addition 7. The difference between driving big loads with 5V relay and 24V relay 5. By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Short circuit protection in PCB design 5. Current flow is controlled by the base. I am confused regarding you question, but possibly use a darlington pair transistor if the hfe of one is too small.

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Ultrasonic transducer driver 1. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. rrelay

Dec 29, 1, I am confused regarding you realy, but possibly use a darlington pair transistor if the hfe of one is too small. I’m just looking for information.

2N with Relay NOT WORKING

Short circuit protection in PCB design 5. I can add relay 12vdc coil with lower current than mA and relaj the NPN to run the coil so it will run the door lock. In this case you want the current to flow through the LED and the relay into the collector, and then “emit” that current into ground, which completes the circuit.


Why I don’t get relaay on relay pins if I have a 5v 3A power supply powering everything? Also, the 2n transistor is getting quite hot.

Home Questions Tags Users Unanswered. Even the 2n222a is the same. Sign up using Email and Password. Taking resistor technology beyond RoHS. Post as a guest Name. If you have two 2n you can use the suggestion of Passerby. When D8 is high, this junction is forward biased and drops about 0.

TO-18 Package Type BJT Transistor 2N2222A Switching Reed Relay EDR201A05

Aug 1, 7, 2, What happens in that case, is that the transistor will actually work except its characteristics will mostly be worse. Facial Recognition Increases Autonomous Vehicles Safety Facial recognition, which reoay many applications in security and biometrics, has recently been drawn to a new realm of application: R3 is a weak pull up, R2 sets the base current for Q2 when Rlay is on.

Thanks for the replies. What is the base current or voltage ahead of the base ohm. Jun 22, 5. Jun 23, Apr 24, 7, 1, One can still have a discussion in the comments under a closed question.


SE so that they have one like this too. How do i check whether an I2C device works?

2n2222 for relay switching

Quote of the day. Because of the low gain, the Vce ends up being 0. I have this circuit. It can probably only put the transistor into 2n222a linear gelay and that is why it is not turned on. There are four solutions. Variable Timer for relay switching Posted by Buzzer25 in forum: I need to run electric door, which consume 12vdc mA at max.

Wow, very cool, I did not knew BC derlington pair.