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Resources by crutschow

Simple 2-BJT LED constant-current driver operates to within 0.7V of the supply voltage.
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All digital one-shot circuit generates precise, selectable pulse-widths
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Digital one-shot generates precise pulse width with no RC components.
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1-Quadrant Analog Multiplier Circuit Uses PMW Circuit For DC to Low Frequency Signals
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PWM solenoid driver provides initial full voltge pulse and a lower PWM hold for good efficiency
4.00 star(s) 1 ratings
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Output of a typical buck switching regulator is externally adjusted from 0V to full-scale.
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LM317 circuit requires only 3 added transistors to allow zero to maximum current-limit adjustment.
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Three-transistor current limit has low voltage drop and adjusts to zero current out
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High-side, 2-terminal circuit replaces vehicle mechanical flasher unit.
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555 VCO (Voltage Controlled Oscillator) uses constant current control to give wide control range.
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Paralleling LM317 regulators for higher current, using TL431 reference for excellent performance
4.75 star(s) 4 ratings
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Circuit separates combined turn/stop signals for separate turn/stop lamps using no added power
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Circuit combines the brake-signal and turn-signal into one lamp with no added power connection
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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
5.00 star(s) 3 ratings
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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
5.00 star(s) 1 ratings
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Lead-acid battery charger using LM317 provides auto CC charge, CV top-off, and final trickle-charge
5.00 star(s) 2 ratings
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