Transistor multi-resonant circuit DIY kit Flash Electronic training equipment | Игрушки и хобби

Transistor multi-resonant circuit DIY kit Flash Electronic training equipment | Игрушки и хобби

Transistor multi-resonant circuit DIY kit Flash circuit Electronic training equipment     This circuit is a standard triode multivibrator. The left and right circuit symmetry consists of the same components. When the power supply is turned on, the two triodes must contend for conduction. However, due to the difference in components, only one tube is turned on first. If VT1 is turned on first, then the VT1 collector voltage drops, VD1 is lit, and the left end of capacitor C1 is close to zero voltage. Since the voltage across the capacitor cannot be abrupt, the VT2 base is also pulled to approximately zero voltage, causing VT2 to turn off. VD2 is not lit. As the power supply charges C1 through the resistor R1, the base voltage of the transistor VT2 gradually rises. When it exceeds 0.6 volts, VT2 changes from the off state to the on state, the collector voltage decreases, and VD2 is illuminated. At the same time, the drop of the collector voltage of the transistor VT2 causes the base voltage of the transistor VT1 to also jump downward by the action of the capacitor C2, and VT1 is turned off by conduction, and VD1 is extinguished. In this cycle, the two transistors in the circuit are turned on and off in turn, and the two LEDs continuously illuminate. Changing the capacity of the capacitor can change the speed at which the tube circulates.   Operating voltage is DC3-6V （Kit price does not include battery.）