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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Resources by crutschow

Simple circuit for hot-swap of two batteries with low forward operating drop
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LM317 Pb battery trickle charger provides desired temperature compensation
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Circuit generates voltage output determined by DIP switch settings
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Simple circuit for generating the stepped waveform used in quasi-sinewave DC-AC inverters
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Two IC chips decode rotary quadrature encoder signals
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A brief discussion of the basics of the 555 Timer operation
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Simple way to calculate single-supply, non-inverting op amp circuit with offset
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AC powered electric fencer requires no line transformer for output isolation
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A Sallen-Key Active-Filter can be built using BJTs instead of an op amp
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Game show circuit, using only one SCR per person, locks out all others after first button is pressed
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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
4.00 star(s) 1 ratings
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PWM solenoid driver provides initial full voltge pulse and a lower PWM hold for good efficiency
4.50 star(s) 2 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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