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Articles from crutschow

  1. crutschow

    555 One-Shot Timer Has Zero Quiescent Power

    One-shot timer uses no power when quiescent, useful for battery powered circuits
    0/5, 0 votes
    Updated:
    Apr 18, 2018
  2. crutschow

    Lead-Acid Battery Charger, 12V 6A, Using Hysteretic SMPS Circuit With Auto Trickle-Charge

    Simple, efficient, lead-acid battery charger auto switches from CC to CV (trickle-charge) mode
    0/5, 0 votes
    Updated:
    Apr 9, 2018
  3. crutschow

    Power Saving DC Solenoid Driver Provides Initial Full Power Actuation Followed By PWM Hold

    Circuit applies full actuation power to solenoid with PWM hold reducing power to 12-25% of nominal
    0/5, 0 votes
    Updated:
    Apr 1, 2018
  4. crutschow

    Low-Dropout CC/CV 12V Lead-Acid Battery Charger With Auto Trickle-Charge

    Minimal circuit for auto CC/CV charging. Option allows pot adjustment of charge current.
    0/5, 0 votes
    Updated:
    Mar 11, 2018
  5. crutschow

    Low Drop, High-Side Sense Current Limiter Adjusts to Zero

    Two simple high-side sense current limit circuits adjust to zero current and have low voltage drop
    0/5, 0 votes
    Updated:
    Mar 8, 2018
  6. crutschow

    Binary ↔ BCD Conversion Using Counters

    Combination of Binary & BCD counters do Binary↔BCD conversions.
    0/5, 0 votes
    Updated:
    Feb 23, 2018
  7. crutschow

    Simple 15V, 1.5A, CC/CV Bench Power Supply Circuit - (With Optional Laptop Charger Source)

    Inexpensive, single regulator IC power supply with I and V adj. to zero, includes I & T monitors
    0/5, 0 votes
    Updated:
    Feb 6, 2018
  8. crutschow

    Simple & Inexpensive Ideal-Diode MOSFET Circuit

    Good for low-drop diode applications, such as blocking battery back-charging or brownout protection
    4/5, 1 vote
    Updated:
    Sep 19, 2017
  9. crutschow

    Push-Button Relay Latch Circuit With Simple Debounce

    PB alternate action circuit uses CD4013 FF with simple debounce to control relay (or other load).
    0/5, 0 votes
    Updated:
    Jun 20, 2017
  10. crutschow

    LM317 CC/CV 12V Lead-Acid Battery Charger With Automatic Trickle Charge

    Lead-acid battery charger starts with constant-current and ends with constant-voltage trickle charge
    0/5, 0 votes
    Updated:
    Jun 18, 2017
  11. crutschow

    Resonant Inductive Charging of Capacitor Improves Efficiency And Amount of Stored Energy

    Capacitor resonant charging can nearly double the charge efficiency and quadruple energy stored.
    0/5, 0 votes
    Updated:
    May 30, 2017
  12. crutschow

    Analog Max/Min Value or Bi-Level Clamp Circuits

    Circuit outputs the min. or max. value of several analog inputs, or provides accurate bi-level clamp
    0/5, 0 votes
    Updated:
    May 2, 2017
  13. crutschow

    Missing Pulse Detector Circuits Using LM339/393 Comparator or CD4049 Gate

    Watchdog timer circuits, alternate to 555 designs, will timeout on either high or low hang
    0/5, 0 votes
    Updated:
    Apr 15, 2017
  14. crutschow

    Triple Output Tracking Power Supply Uses Standard 3-Terminal Regulators, Adjusts to Zero Out

    Single +output plus dual +/- tracking output supply using common 3-terminal regulators goes to 0V.
    0/5, 0 votes
    Updated:
    Mar 9, 2017
  15. crutschow

    Efficient MOSFET Bridge Rectifier for Resistive Loads, Or Input Power Auto Polarity Gating

    MOSFET bridge for efficient resistive load rectification, or indifference to input power polarity.
    0/5, 0 votes
    Updated:
    Mar 8, 2017
  16. crutschow

    PWM Voltage Control Of Standard Linear IC Regulators

    PWM allows easy control of linear regulator output voltage for μP based power supplies
    0/5, 0 votes
    Updated:
    Feb 14, 2017
  17. crutschow

    Low Power CMOS PWM Circuit With Buffer Output Requires Only 5 Components

    CD4093 PWM circuit uses only 2 diodes, 1 capacitor, and 1 potentiometer
    0/5, 0 votes
    Updated:
    Feb 9, 2017
  18. crutschow

    Single Supply Non-Inverting Av=1 Op Amp Circuit With Simple Offset Voltage Calculation

    Circuit generates Av=+1 with simple offset calculation using std. resistor values
    0/5, 0 votes
    Updated:
    Feb 8, 2017
  19. crutschow
    0/5, 0 votes
    Updated:
    Jan 30, 2017
  20. crutschow

    Simple, Efficient, Inexpensive, High-Power LED Constant-Current Switching Supply

    Constant-current hysteretic buck regulator supply for high power LEDs, efficiency of 90%
    0/5, 0 votes
    Updated:
    Jan 25, 2017