2SA Datasheet PDF Download – Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS), 2SA data sheet. 2SA datasheet, 2SA circuit, 2SA data sheet: KEC – Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS),alldatasheet, datasheet. datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes and other semiconductors.

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Olin Lathrop I’m trying to make an accurate calculation, but I have little understanding of how to produce it. The main job of Q1 is to turn on Q4, so it can power the load. Lower values turn it off faster. The RoboCommunity Webiste no longer accepts new users. Thanks for the feed back.

Sign up using Email and Password. The circuit basically consists of 3 sections: Try to find one and pull it out of the circuit and check the pin lay out and measure it’s B to C and B to E.

2SA KEC(Korea Electronics), 2SA Datasheet

Something in the 2. The load is a unspecified LED emitting visible light. Instead of just poking at random values and asking what difference they make, stop and actually think about the circuit. Sunday, 30 May Sign up using Facebook. To do even better I’d use some CMOS logic based circuit because that will be miles better regarding power consumption. That’s the main current that Q1 needs to be able to sink when on. This can work for different values of the resistors R2, R3, Datqsheet, R8.


Since R3 only needs to react “instantly” on a human time scale, there is no need to make R3 small.

2SA1273 Datasheet

The purpose of R8 is to make sure Q4 is off when not being explicitly driven. The base of Q1 needs 2. Hope this helps you out. The lowest voltage drop for such a LED would be 1. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

I can’t find a relacement or equivilent. I would therefore use 3. I would use 1. Each transistor being on keeps the other on. Let’s therefore work backwards requiring Q1 to sink 2. Q2, Q4 is 2SA Post Your Answer Discard 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.

That turns off Q2, which then no longer provides base current to keep Q2 on. That shorts the base of Q1 to ground, turning it off. Log in to post comments.


Looking for Germanium Transistor for Rovio.

2SA PDF – PNP Transistor – KEC –

When Q1 datashete off, Q2 is off, which then does not try to turn on Q1. Changing R2, R3 will make the latch work or not. That results in Hey all, I’ve been trying to figure out why one of my Rovio’s motors only spins one way.

Now you have to go back and update the min required current sink value for Q1, and ripple thru all the downstream calculations from that as shown above.

I found the trigger latch circuit: Let’s say we used 2. Added You now say that you want to support a 2sa11273 load current of mA, and that the gain of Q4 is Here is the datasheet URL for this transistor.

Since you haven’t specified speed, there is no way to say whether 5. I added both circuits. Jax edited the first few lines “removed that is”. Sign up or log in Sign up using Google.


With R4 of 5. Let’s say now B-E is mV.