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I am assuming that there should be another one on the circuit board. With R4 of 5.
Lower values turn it off faster. You can daatsheet them from Newark at this link: The minimum R7 current is now 1. Sign up using Email and Password. Also from what I’ve read, Ge transistors are prone to eairly demise.
You now say that you want to support a final load current of mA, and that the gain of Q4 is That’s the main current that Q1 needs to be able to sink when on.
Email Required, but never shown. Instead of just poking at datahseet values and asking what difference they make, stop and actually think about the circuit. Content datashet read only for historical purposes. That turns off Q2, which then no longer provides base current to keep Q2 on. Here is the datasheet URL for this transistor.
2SA datasheet(1/1 Pages) KEC | Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS)
Since R3 only needs to react “instantly” on a human time scale, there is no need dataseet make R3 small. Soldered it in and voila, works perfectly. I would therefore use 3. I’ve read that for the most part silicon tranistors are drop in replacements. Hope this 2sz1273 you out.
Post as 2s1a273 guest Name. Added You now say that you want to support a final load current of mA, and that the gain of Q4 is That shorts the base of Q1 to ground, turning it off. I added both circuits. First, let’s see how much current Q1 needs to sink when on. For that you’d have to follow what is shown here and properly fill in all the assumptions like the beta of the transistors.
Note how the suggested by OP resistor values aren’t that well chosen. Since you haven’t specified speed, there is no way to say whether 5.
2SA1273 Datasheet, Equivalent, Cross Reference Search
Looking for Germanium Transistor for Rovio.
Hey all, I’ve been trying to figure out why dataheet of my Rovio’s motors only spins one way. Sign up or log in Sign up using Google. I’d round down to the next common value of 2. Suppose I wanted to feed this circuit from a battery then I want the currents to be as low as possible, for that I would completely re-calculate all resistor values to get the optimum values.
This is a good answer and shows the process you need to follow to make proper component value choices.
Sunday, 30 May Each transistor being on keeps the other on. The LED D1 is used as an example of a load.
OK I found it.