Warm tube "clicker"


    Traveling through the Internet, I came across one uninteresting category of toys - "clickers." I was especially pleased with the Office Clicker . Stupidity is of course utter, but there is something in it. You can write some script that will play instead of me, but this is too trite. I decided to make a hardware clicker, but not just a hardware one, but a warm-tube clicker! Interesting? I ask under the cat!

    Warm "tube" circuitry

    The scheme came to my mind a very non-trivial, it was based on the automobile high-beam bulb (which I will proudly call a “lamp”):

    Parts ratings:
    • R1 = 10 KOhm (multiturn);
    • R2 = 5 ohms (5 W);
    • R3 = 470 OHM (0.25 W);
    • R4 = 100 Ω (0.25 W);
    • C1 = 47 μF (25 V).

    The principle of the scheme is as follows:
    1. “Lamp” has cooled (cools);
    2. Voltage U1 <U2;
    3. The comparator provides a enable signal to the transistor T1;
    4. Transistor T1 is open;
    5. The relay contacts are closed;
    6. A current begins to flow through the “lamp” => it heats up;
    7. The resistance of the "lamp" increases;
    8. The voltage U1 grows and approaches U2;
    9. When U1> U2, the comparator stops signaling at T1;
    10. Transistor T1 is closed;
    11. Relay contacts open;
    12. U1> U2, but gradually U1 decreases;
    13. GOTO 1.

    The frequency of the generated signal depends on:
    • time constant t = R5 * C1;
    • warm-up time (and cooling) "lamp".

    By changing the voltage U2, we change the heating time of the “lamp”, respectively - the more U2 the lower the frequency will be.

    Resistor R4 and Zener diode D1 (for voltage 3.3V) are used to generate a control signal for the next node - the Arduino Duo board.


    As you already understood, I chose the Arduino Duo board as the interface board between the “tube” relay and the computer.

    The principle of operation is very simple:
    • when in the "clicker" transistor V1 is closed, the Arduino receives a 3.3V control signal when the transistor is open - 0V;
    • Arduino interprets 3.3V as a guide for pressing the paint button;
    • Arduino interprets 0V as a guide to let go of LMB.

    Here is the program for Arduino, which I wrote about this:
    #define VACUUM_LINE 13voidsetup(){
      if (digitalRead(VACUUM_LINE) == HIGH)
      if (digitalRead(VACUUM_LINE) == LOW)

    We are testing

    Instead of a thousand words, I suggest watching one video:

    Thanks for attention! I hope my article has helped to improve your mood!

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    What kind of "clicker" would you do?

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