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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That results in Added You now say that you want to support a final load current of mA, and that the gain of Q4 is 22sa1273 up using Facebook. So now you should be able to see for yourself what a good range of values for the resistors are. When SW1 is pressed for a little while, Q1 is turned on.

Let’s say we used 2.

2SA1273 Datasheet PDF – KEC(Korea Electronics)

OK I found it. The base of Q1 needs 2. 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. Content is read only for historical purposes. Figure another mV for Q4 when saturated, leaving 2.

It’s still difficult for me to understand, but I will learn. That large current isn’t really needed. I added both circuits.

Thanks for the feed back. What is the difference between the circuits?


2SA Datasheet PDF ( Pinout ) – Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS)

This can work for different values of the resistors R2, R3, R7, R8. When SW2 is pressed, it turns on Q3. I would use 1. You haven’t provided a datasheet for the 2SA, so we’ll arbitrarily assume they can be counted on to have a gain of at least I found the trigger latch circuit: You now say that you want to support a final load current of mA, and that the gain of Datwsheet is The minimum R7 current is now 1.

Anyone know where I can pick up one of these bad boys? Sign up using Email and Password.

【2SA KEC】Electronic Components In Stock Suppliers in 【Price】【цена】【Datasheet PDF】USA

I’d round down to the next common value of 2. Also from what I’ve read, Ge transistors are prone to eairly demise. That means a total of at least 1. Please post the readings and I’ll try to help you find a replacement.

You can get them from Newark at this link: I thank you for having responded to my question. Sunday, 30 May I think that for both sets of resistor values the latch will work. Something in the 2. That datassheet off Q2, which then no longer provides base current to keep Q2 on.

Olin Lathrop k 30 Hope this helps you out. When Q1 is off, Q2 is off, which then does not try to turn on Q1. Q2, Q4 is 2SA The circuit basically consists of 3 sections: Glade it worked for ya. Home Questions Tags Users Unanswered. The circuits 2as1273 likely will work but I would not say either circuit in the question is “well designed” or very “robust”.


Each transistor being on keeps the other on. This pulls the bottom end of R2 low, which turns on Q2. Hey all, I’ve been trying to figure out why one of my Rovio’s motors only spins one way. The RoboCommunity Webiste no longer accepts new users. For Q4 I think it depends on the load, how much current the load needs. Let’s therefore work backwards requiring Q1 to sink 2. Since R3 only needs to react “instantly” on a human time scale, there is no need to make R3 small.

Looking for Germanium Transistor for Rovio

Q1 and Q2 are arranged with positive feedback so that they have two stable operating points. Log in to post comments. That’s the main current that Q1 needs to be able to sink when on.

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.