arduino 555 timer


They can shoot iron projectiles. The main component of the electronic circuits was not Reno nano microcontroller which, as you can see, it does its job just fine, but many of you are stated that they would love to see another approach with more classical ICS without programming. So in this video I will show you how easy that sounds and no difficult it actually can get to recreate an Arduino circuit to Wolff common eye sees and what the pros and cons of this are let’s get started. First off, I gathered all the ICS that I had laying around and might need for this project. Most importantly also called logic gates which usually have one or more inputs and one output. They exist and ICS, which only turn the output on when the input 1 and input 2 are connected to oppose the voltage aka our high AKA r1. However, you want to call it. Then we have our ICS, which turn the output on when input 1 or input 2 or Bava high, not aka, inverter ICS, which turned out puts on or off in reverse to the inputs and combinations of n o ICS, who have not ICS to create nand’s and Nors another mandatory IC is the so called RS latch, which consists of logic gates in order to maintain a switched on outputs. Even when the set pin switches from 5 volts back to ground, the reset pin can then obviously reset the output States to turned up again and last but not least, we will need an op amp as a comparator, while the Arduino was capable of distinguishing between the Two output states of the optical sensor – these logic gates, cannot do that, so the comparator will output the logic gates compatible fivefold level.

Once the applied voltage on the plus input is higher than the reference voltage on the inputs, which I can adjust by utilizing a potentiometer and with those basics out of the way, let’s try to come up with a logic diagram. First off the tactile switch once pushed needs to turn on the output of an RS latch, which then turns on the driver of the first coil stage, and if you’re wondering why there is an inverter, my CD, forty or forty four RS latch has inverted inputs. So I need another additional inverter to get rid of that effects. Once the projectile then reaches the first optical sensor. The comparator turns on its outputs and resets the first ledge, while simultaneously turning on the second ledge and thus the second driver and coil stage. Ultimately, the projectile reaches a second optical sensor, which once again turns on the comparator, resets the ledge and turns off the second driver in the you year. This logic diagram works, but imagine if something goes wrong and the projectile never reaches a sensor. The first coil stage would get destroyed by the continuous high current the Arduino solved this problem over timer, which turns off the drivers automatically. After around a seconds to recreate this function, we could use a 10 microfarad capacitor and a 100 kilo ohm resistor in series on the output of both latches. The five fold of the circuits will charge up the capacitor up to 3 volts in roughly 812 milliseconds.

We could use this reference voltage as a trigger for an additional comparator to turn off the reset of the ledge prematurely, which also forces us to use the logic or gates. And in order to discharge the capacitor, we will need a bipolar transistor, which turns on once. The output of the latch is low, which also requires another inverter. Now this logic circuit still has minor box like if you hold the tektite switch forever or that the second coil stage turns on when you insert the projectile, but for now this is good enough. So let’s create a proper circuit diagram for that I use the easy EDA circuit design software because it was rather simple to find the required I sees in their online database, as you might already have noticed. Not only the creation of the logic diagram took a lot of time, but also the schematic design as well. If we compare it to the relatively simple circuit of the Arduino, but nevertheless once the diagram was complete, I went ahead and created a prototype of its on to breadboards. Needless to say, though, it was a mess simply because of the increased number of components and connections. Afterwards, I added male headers and the necessary wires to the Arduino socket of McCoy gun connected those to my circuits, fine tuned, the potentiometers for the comparators and tested it out. As you can see, the circuit without programming works fine as well. So it is assembled the prototype and realize that soldering, the components to the bottom side, perfboard of McCoy gun, would have been impossible for circles of that size.

Edging PCB year or ordering professionally made ones is definitely more appropriate and if we add the price of each IC from the control circuits, it would cost around 3 euro. So we might as well order not winner from China. For that price, whose functions in the circuits we could easily extend through software instead of hardware changes. The only real advantage of the IC circuit is the speeds. It is way faster than the Arduino, all in all there’s, more than one way to skin a cat. But I personally prefer the Arduino because of its flexibility and low price. I hope you liked this video, as always don’t forget to Like share and subscribe.


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Originally posted 2016-03-03 23:22:11.

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Comment (19)

  1. if only we could make IC’s so small that their transistors are a few nanometers across, then put trillions of them on the same chip!!! 🙂

  2. I don’t think people should be complaining about how much more complicated this is than the Arduino circuit, unless for some reason you are planning to mass produce these things. I think a huge point of the world of being a maker is learning, and doing a complicated circuit like this, while much more difficult, is also much more rewarding in terms of your knowledge and skills. At least for me, I believe that.

  3. Did the people who complained about arduino realize you can download code and buy an arduino for $2-$4 usd
    This is litterally manualy coding something

  4. I would prefer to use an FPGA than buying that amount of ICs. Imaging if you had to update the design for improving… Is better Arduino, or an FPGA (something you can reprogram)

  5. Why do you need 2 ‘NOT’ gates in series they would counter each other and do nothing i did not get it 🙁

  6. Great video 🙂
    I do love designing an old-skool logic circuit – when done right there is a certain elegance to them, and they are easier to analyse if you’re trying to reverse-engineer a circuit.

    But arduinos really do make designing sooooo much easier.

    If I need the speed I’ll take the time and make the logic circuit, but these days I’m most likely to use a combination of both 🙂

  7. I’m old school, I am sure you could do that with just four transistors. Simply have a two transistor monostable fire the first coil and an optical sensor fire a second monostable. Heck l think I could do away with the optical sensor and fire the second monostable directly from the first.
    IC”s used to be expensive and us kids would take apart old TV’s, record players and radios just for the bits.


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