-
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 2-BJT LED constant-current driver operates to within 0.7V of the supply voltage.
All digital one-shot circuit generates precise, selectable pulse-widths
Digital one-shot generates precise pulse width with no RC components.
1-Quadrant Analog Multiplier Circuit Uses PMW Circuit For DC to Low Frequency Signals
PWM solenoid driver provides initial full voltge pulse and a lower PWM hold for good efficiency
Output of a typical buck switching regulator is externally adjusted from 0V to full-scale.
LM317 circuit requires only 3 added transistors to allow zero to maximum current-limit adjustment.
Three-transistor current limit has low voltage drop and adjusts to zero current out
High-side, 2-terminal circuit replaces vehicle mechanical flasher unit.
555 VCO (Voltage Controlled Oscillator) uses constant current control to give wide control range.
Paralleling LM317 regulators for higher current, using TL431 reference for excellent performance
Circuit separates combined turn/stop signals for separate turn/stop lamps using no added power
Circuit combines the brake-signal and turn-signal into one lamp with no added power connection
Radio push-button function is provided by a simple circuit using a CD4011 in a latch configuration
Single Op amp provides linear, single-ended output for bridge sensor resistance change.
TL431 provides accurate, adjustable voltage crowbar function for circuit overvoltage protection
LV, LP, CC driver allows two alkaline or NiMH cells to steadily power a Red LED until discharged.
Charger performs recommended charging function for rechargeable NiZn batteries
Low parts-count circuit monitors multiple alarm switches, includes arm and entry delays
Lead-acid battery charger using LM317 provides auto CC charge, CV top-off, and final trickle-charge
