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Bistable Multivibrator or Flip/Flop
Circuits
Bistable (Flip-Flop): #'s-D
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Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Circuits Designed by Dave Johnson, P.E. : |
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1.5V TOUCH ACTIVATED SWITCH
A single 1.5v silver oxide button cell powers this complete touch activated switch
circuit for 5 years. It features both a normally open and a normally closed
set of solid-state switch thermals. It also has an adjustable sensitivity,
which can be set for a touch capacitance change as small as 1 picofarad.
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D-FLIP/FLOP ONE SHOT CIRCUITS
Yes you can use cheap D flip/flop logic circuits as nice one-shot pulse generators.
This schematic shows how the popular CD4013 and the CD74HC74 can be used to generate
pulses ranging from nanoseconds to seconds.
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Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:
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1.5V Battery Powers Capacitance Switch - Using a unique
differential time comparison technique this capacitance switch can detect
a change of just one picofarad. [Designed by David A. Johnson] |
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1.5v Touch Activated Switch - A single 1.5v silver oxide button
cell powers this complete touch activated switch circuit for 5 years.
It features both a normally open and a normally closed set of solid-state
switch thermals. It also has an adjustable sensitivity, which can be
set for a touch capacitance change as small as 1 picofarad. …. [Designed
by David A. Johnson] |
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12F675 as a Flip Flop - Code to make a 12F675 operate as a
D-type or JK-type flip flop. Since I implemented a D type flip flop
using PIC Logic Elements I thought I might go or way and
implement an entire D type flip flop in a single PIC. This uses edge
triggered and port change status interrupts and was an opportunity to have
a play with interrupts on PIC.... (added 10/05) |
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3v Capacitance Proximity Switch - This circuit was designed to
provide a touch activated switch function without an external power
supply. It draws so little power that a single 3v battery will
operate the circuit for many years. It is discussed in more detail
in the section on Capacitance Proximity Switch Technology. (Note: link is
off-site) …. [Designed by David A. Johnson] |
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555 Bistable Circuit - Basic circuits and information about this
timer/oscillator. Scroll to find Bistable Circuit (11/06) |
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An SCR Flipflop for Alternating Flashing Light Bulbs - ….(electronic
schematic added 12/08) |
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AN-1150: COP8 FLASH ISP HANDBOOK-Intro to ISP - National Semiconductor
Application Note (app note added 2/06) |
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AN-1281:Bumped Die Flip Chip Packages - National Semiconductor Application Note
(app note added 2/06) |
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CMOS Toggle Flip Flop using Laser Pointer - The circuit below uses a CMOS dual D
flip flop (CD4013) to toggle a relay or other load with a momentary push button. Several
push buttons can be wired in parallel to control the relay from multiple locations. A high
level from the push button is coupled to the set line through a small (0.1uF) capacitor.
The high level from the Q output... [Bill Bowden's site] |
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CMOS Toggle Flip Flop Using Push Button - The circuit below uses a CMOS dual D
flip flop (CD4013) to toggle a relay or other load with a momentary push button. Several
push buttons can be wired in parallel to control the relay from multiple locations. A high
level from the push button is coupled to the set line through a small (0.1uF) capacitor.
The high level from the Q output... [Bill Bowden's site] |
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DAC and flip-flops form constant-current-source - 23-Apr-09 Issue of EDN
Using two flip flops, you can program a serial-input DAC to produce a constant 4 mA....
[Design Idea by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia] |
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Descrete Set/Reset Flip Flop - Here are two examples of bistable flip flops
which can be toggled between states with a single push button. When the button is pressed,
the capacitor connected to the base of the conducting transistor will charge to a slightly
higher voltage. When the button is released, the same capacitor will discharge back to the
previous voltage causing the transistor to turn off. The rising voltage at the collector
of the transistor that is turning off causes the opposite transistor to turn on and the
circuit remains in a stable state until....(circuit added 05/09) |
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D-Flip/Flop One Shot Circuit - Yes you can use cheap D flip/flop logic circuits
as nice one-shot pulse generators. This schematic shows how the popular CD4013 and
the CD74HC74 can be used to generate pulses ranging from nanoseconds to seconds. ….
[Designed by David A. Johnson] |
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D-Flip/Flop Oscillators - Yes you can turn flip/flop ICs into low current
oscillators. This schematic shows you how.... [Designed by David A. Johnson] |
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Discrete BiStable Flip Flop - (electronic schematic / circuit added 4/02)
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Discrete Set/Reset Flip Flop - This is an example of a set/reset flip flop using
discrete components. When power is applied, only one of the transistors will conduct
causing the other to remain off. The conducting transistor can be turned off by grounding
it's base through the push button which causes the collector voltage to rise and turn on
the opposite transistor. (added 04/04) |
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Dual flip-flop forms simple delayed pulse generator - 17-Apr-08 Issue of EDN
A delayed pulse generator provides precision timing adjustments.... [Design Idea by Luca
Bruno, ITIS Hensemberger Monza, Lissone, Italy] |
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Bistable (Flip-Flop):
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