The phasor is the ray weapon that we see in many science-fiction films. The characteristic sound can be imitated with this circuit found in Radio Electronics of the years 90.
One touch of the sensor and the LEDs run. When you take your finger off the sensor, only one will...
This circuit was obtained from an English magazine from 1980, but as it uses components that can...
In the figure we have a basic oscillator with inverters obtained from TTL, CMOS or other gates....