Mikruha 74LS05 and its application?

Question

Programming

Hello everybody!
I purely by chance (found on the road, in the truest sense of the word) got 8 mikruh 74LS05.
I checked them, as far as I understood - the workers.
The question is where can it be applied?
It's a pity to throw it away - each costs around 20 UAH.
To hand over to the store - they will not accept it or they will take a ruble per box, our hucksters are cunning ..
Throw on the shelf does not allow conscience.
So far I have found only one application for it - the LPT\smbus interface, and the programmer circuit for flashing batteries. But I don’t need 8 (more precisely 7, one has already assembled, in fact, checked all the mikruhi) programmers for nothing, and therefore the question is - where can they be adapted?
Habravchan friends, can you be a little creative in your answers, only more or less detailed, so that even a person relatively far from electronics and programming, like me, can figure it out?
Thank you all in advance! With coming!

Answer 1

Make a clock generator: connect the output of one inverter to the input of another and so on several times (an odd number of inverters), close it in a ring. If you make switched (on switches) connections, you will get different frequencies.

Answer 2

1. For your 7405 inverters using LPT in arduino, there is no longer a need. You can program via LPT.
2. After all, there are a bunch of sketches that allow you to turn an arduino into a programmer. If you mean a board with a soldered microcontroller, but not an arduino (usually an arduino has at least 3 microcircuits), then programming the controllers can also be done using LPT + 7405 + " Flash the AVR manually ".
3. It is not necessary for the addition to answer to yourself: in the question, the edit button is visible to you. That doesn't stop you from expanding the question.

Answer 3

Here's another thought. Is it possible to somehow control the same arduino with it?
Suppose, through the LPT, send a certain code to the input of the arduino, say, 00101001, and the arduina already reacts to it somehow - switches the relay or something like that?
Or in this circuit you can throw out the arduino?
I have 3 arduino nano boards (atmega 368), they are lying around idle (I took 5 pieces for the price of two on Ali), but there is no programmer for them (lost).