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Radio push-button function is provided by a simple circuit using a CD4011 in a latch configuration
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Single Op amp provides linear, single-ended output for bridge sensor resistance change.
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TL431 provides accurate, adjustable voltage crowbar function for circuit overvoltage protection
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LV, LP, CC driver allows two alkaline or NiMH cells to steadily power a Red LED until discharged.
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Charger performs recommended charging function for rechargeable NiZn batteries
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Low parts-count circuit monitors multiple alarm switches, includes arm and entry delays
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Lead-acid battery charger using LM317 provides auto CC charge, CV top-off, and final trickle-charge
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Weight Scale using SFE's OpenScale platform
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PB latch circuit provides on/off delay function to prevent accidental power switching
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Circuit combines PWM controlled constant-current source with 3rd-order filter using one opamp
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