Melody Door Ringer

Melody Door Ringer Circuit Description In all the houses exist the bells in the door. All want, they have the possibility of being possible to change the intensity, the tone of sound. With this circuit we have this possibility. With Continue reading

123 Game – All MCU-free

123 Game – All MCU-free Circuit diagram: Circuit Description This electronic game pits a human player against the ‘machine’. The opponents use a common ‘game token’ and take turns moving along a path by one, two or three steps, and Continue reading

Digital Roulette with Display

Digital Roulette with Display Circuit Description This circuit is a small digital “roulette’. It is constituted by oscillator IC1, the counter IC2, the transistors Q1-7 that drive the display common cathode DSP1. The supply basically becomes from a battery 9V, Continue reading

Electronic Dice

Electronic Dice Circuit Description The particular circuit is substantially a generator of accidental numbers, from 1 until the 6. The clue him we see in a line from led, that each one corresponds also in a number from the 1-6, Continue reading

Plant Watering Watcher – Version II

Circuit diagram: Electronic Components: R1,R4________470K 1/4W Resistors R2____________47K 1/2W Trimmer Cermet or Carbon R3___________100K 1/4W Resistor R5_____________3K3 1/4W Resistor R6____________15K 1/4W Resistor R7___________100R 1/4W Resistor C1_____________1nF 63V Polyester Capacitor C2___________330nF 63V Polyester Capacitor C3,C4_________10µF 25V Electrolytic Capacitors D1__________1N4148 75V 150mA Continue reading