Comprising a microprocessor, an LCD, a 32.768-kHz crystal, and little else, the basic countdown-timer circuit in Figure 1 operates from a commonly available CR2032 lithium-coin-cell battery. Based on ...
SAN FRANCISCO – You’re stuck at a red light. It’s taking forever. How much time until the light turns green? Ten seconds? Twenty seconds? A minute and a half? Would you be more patient if you knew ...
For one of my hobby projects, I needed to add a small countdown timer at an affordable cost. Fortunately, a DigiSpark Attiny85 development board was lying around on my workbench. The next component ...
SAN FRANCISCO — You're stuck at a red light. It's taking forever. How much time until the light turns green? Ten seconds? Twenty seconds? A minute and a half? Would you be more patient if you knew ...
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