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If the display uses LEDs for the segments, resistors are required to limit the current through them to a safe level. If the display uses liquid crystal technology, these resistors are no longer necessary, since liquid crystal displays draw no current. However, if you build a project using a liquid crystal display, be sure to [...]
This be Random Number Generator Circuit there is the character is 10 LED Flasher by use IC 4017 and IC 4011. For the 4017 IC is a 16-pin CMOS decade counter. It takes clock pulses from the clock input, and makes one of the ten outputs come on in sequence each time a clock pulse [...]
This circuit will trigger with any fluid with a resistance under 900K between the maximum separation distance of the probes. Let me explain further. The circuit uses a 4050B CMOS hex buffer working on a 5 volt supply. All gates are biased off by the 10M resistors connected between ground and buffer input. The “common” [...]
