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In the early digital era, logic gates were made exclusively of transistors and discrete components. The obvious occupation of a large space and increased heat dissipation pushed technology to ...
Although IC CD4017 is a decade counter, it can be used in a variety of ways. In this programmable LED indicator circuit, it has been used to program a bicolour LED indicator in 10 different modes ...
Measuring long-period signals and translating them to low-frequency RPM is challenging, but a circuit built of medium-scale ICs will do so—without a microcontroller or firmware ...
Used chips: OP07, CA3140, CA3080, CD4066, CD4093, TL084, CD4081, CD4011. No expensive or non available curtis chips as well as no expensive transistor array for the exponential conversion. Stable ...
This circuit is intended for alerting purposes after a certain time is elapsed. It is suitable for table games requiring a fixed time to answer a question, or to move a piece etc. In this view it is a ...
From the description we know that it uses a combination of CD4017, CD4030, CD4072, and CD4081 chips. You’re probably familiar with the 4017 which is a decade counter popular in a lot of project.
Posted in Security Hacks Tagged cd4017, cd4030, cd4072, cd4081, combination lock, combo lock, lock, logic ...
Based on CD4017 and logic gates this electronic circuit switches on a relay if you press four keys in the correct sequence, and backs to the start condition by pressing any key. Once the circuit is ...
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