We must also select our supply voltage, so for this example we will use 12 volts. No, create an account now. Your failure to post a schematic has many people wondering about the legitimacy of your problem or a need for attention. The parties hereto are for all purposes of this Agreement independent contractors, and neither shall hold itself out as having any authority to act as an agent or partner of the other party, or in any way bind or commit the other party to any obligations. While PNP transistors are normally used for a negative ground configuration, it is possible to use a NPN transistor if a positive ground configuration is desired as indicated in Figure 2.

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While our transistor switch can easily replace many mechanical relays, it does have a few drawbacks. May 14, 5 0.

2N3906: Small Signal PNP Bipolar Transistor, TO-92

The actual transistor used as a switch is not critical in these applications. Request for this document already exists and is waiting for approval. Licensee agrees that it shall comply fully with all relevant and applicable export laws and regulations of the United States or foreign governments “Export Laws” to ensure that neither the Content, nor any 2b3906 product thereof is: Cannot switch 5v relay with adapter power supply Ask Question.


I can see the programming logic all working fine with putty. Your request has been submitted for approval. In the case of MA, the transistor must be able to withstand 30 milliwatts. How to use transistor 2N to turn on relay?

Using Transistors As Switches

May 14, 8. Such license agreement may be a “break-the-seal” or “click-to-accept” license agreement. So, I want to know if there is anyone out there facing such problem, if yes or if I am doing anything wrong please suggest the solution. May 14, 5.

If you agree to this Agreement on behalf of a company, you represent and warrant that you have authority to bind such company to this Agreement, and your agreement to 2n306 terms will be regarded as the agreement of such company.

Nov 30, 18, 9, Now i have edited the post. May 14, 4.

This Agreement may not be amended except in writing signed by an authorized representative of each of the parties hereto. Do you already have an account?

PNP Transistor 2N as a Switch |

It is good practice to always use a diode when turning on any inductive load. It is expressly understood that all Confidential Information transferred hereunder, and all copies, modifications, and derivatives thereof, will remain the property of ON Semiconductor, and the Licensee is authorized to use those materials only in re,ay with the terms and conditions of this Agreement.


Sign up using Email and Password. For this circuit we will calculate R2 to be 10 times R1 as follows: From the title I would assume the transistor is a 2N If this is the case, you will need a level shifter. May 14, 3. BOM, Gerber, user manual, schematic, test procedures, etc. For a better experience, please enable JavaScript in your browser before proceeding. In that event, “Licensee” herein refers to such company.

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These circuits are low in cost and offer ease of design for the radio amateur.

How to use transistor(2N3906) to turn on relay?

Here’s 3 example circuits that I have used on countless occasions without any issues and are known to work. Posted by Dobbies in forum: While there are a few applications where our transistor switches may not be suitable, it is usually a much more reliable and inexpensive alternative to using mechanical relays.

The calculation of resistor values is identical to the PNP version. Post as a guest Name.