I am currently using 3x green Leds (LTL4231N) to replace the zener in the F6.
Will the 3Led lit up during operation? Mine didn't, maybe i have connected them the wrong way round?
Thank you for reply. There was a lot of LED at Akihabara.
I choiced for warmer color...
F4 Biasing Mods
I thought I would do 2 more that could be used on F4 type circuit. This is the first dumb one. The second one is less dumb (I had to use my 2.5 brain cells), I will show that one later.
In this circuit we use a TLV431 device which has a 1.24V reference which will allow us to use 4 Green leds as well as some adjustment.
The regular TL431 won't allow us to use 4 leds with the voltage adjustment we might like to have cause it has a 2.5V reference.
I haven't tested it yet, but it will perform in a similar manner to the F6 circuit.
I hope to test this tomorrow.
I thought I would do 2 more that could be used on F4 type circuit. This is the first dumb one. The second one is less dumb (I had to use my 2.5 brain cells), I will show that one later.
In this circuit we use a TLV431 device which has a 1.24V reference which will allow us to use 4 Green leds as well as some adjustment.
The regular TL431 won't allow us to use 4 leds with the voltage adjustment we might like to have cause it has a 2.5V reference.
I haven't tested it yet, but it will perform in a similar manner to the F6 circuit.
I hope to test this tomorrow.
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Less Dumb F4 Biasing Circuit
Using it like this (see circuit) gives this Voltage vs Temperature curve (using the data from the measured Resistance Curve above)
Even though this one has more adjustments, it requires more brain cells. I like using less brain cells, and I like LEDs cause you know if it is operating, so I am kind of "biased" toward the LED one above.
Pun not initially intended, but I will go with the flow.
Using it like this (see circuit) gives this Voltage vs Temperature curve (using the data from the measured Resistance Curve above)
Even though this one has more adjustments, it requires more brain cells. I like using less brain cells, and I like LEDs cause you know if it is operating, so I am kind of "biased" toward the LED one above.
Pun not initially intended, but I will go with the flow.
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Not sure how I got hooked on this thread, because I only understand about half of it. But it is still very enjoyable to read. I think it has something to do with a recent aquiring more than a life time supply of diodes, lots of zeners, and tons of LEDs giving me hope that I'll be able to do something with. I also enjoy all the dumb references from so many non "dummies"
