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 [...]
The Holtek HT-2811 is available from Maplin electronics in the UK, order code BH69A. The operating voltage must remain within 2.4 to 3.3 Vdc and standby current is minimal. The reset switch zeroes the count,and the 7 segment display is a common cathode type. To save power consumption the display can be enabled or disabled [...]
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