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Pulse Generator Circuits, Page 1
#'s - L      M - Z
Last Updated on: Thursday, October 30, 2014 09:22 AM


Circuits Designed by Dave Johnson, P.E. :
  • CHEAP LOW POWER 3V 2Hz OSCILLATOR
    This is yet another method to generate low frequency output pulses. The circuit uses an inexpensive under-voltage monitor IC and a couple of cheap MOSFETs. It could easily be modified to produce pulse frequencies from about one cycle per minute to a maximum of about 10KHz. It draws only about 1uA from a 3v battery. This circuit should not be used if frequency stability is important, since it will change as a function of supply voltage.


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
555 stepper pulse generator -  ….(electronic schematic added 08/08) [Site is under construction right now]

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Build a simple complementary-bracket-pulse generator -  20-Aug-09 Issue of EDN  When building push-pull switching power converters or motor controllers, you often need alternating pulses with a small amount of dead time between them to minimize simultaneous conduction in output-switching devices. Switching controller ICs have this feature, but they usually operate.... [Design Idea by Horst Koelzow, Global Thermoelectric, Calgary, AB, Canada]
Cheap Low Power 3v 2hz Oscillator -  This is yet another method to generate low frequency output pulses. The circuit uses an inexpensive under-voltage monitor IC and a couple of cheap MOSFETs. It could easily be modified to produce pulse frequencies from about one cycle per minute to a maximum of about 10KHz. It draws only about 1uA from a 3v battery.  This circuit should not be used if frequency stability is important, since it will change as a function of supply voltage.... [Designed by David A. Johnson]
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]
Flashing LED Power Indicator Draws Low Current -  This circuit flashes a power indicator LED to keep the average current low.... [Designed by David A. Johnson]
Flip Flop Circuit -  In this project we examine one of the most valuable circuits to be invented, the flip flop. Originally it was designed with VALVES, along with its simpler version (without the two capacitors, called a bi-stable Multivibrator), it was realised it …(circuits added 04/09)
Flip Flop Flashers Buzzers Etc -  Several circuits here.  The familiar astable flip-flop circuit is a handy configuration for making flashers or generating squarewaves. Here is a typical alternating LED flasher with the LEDs in the emitters instead of collectors as is normally done. The bias resistors are directly connected....(added 04/05/06)
Gated Oscillator Emulates a Flip-flop -  03/16/95 EDN-Design Ideas....The gated oscillator in Fig 1 holds its existing state when disabled rather than being forced high or low-a singular property. Further, you can generate an output at one-half the input frequency if you choose R1 and C so that the oscillator changes state just once when its input goes high.  This configuration eliminates a flip-flop. The circuit.... EDN is migrating links. This link is not verified.  Google the "title" EDN for new link.
High-speed pulse generator has Programmable levels -  05/03/01 EDN-Design Ideas.... EDN is migrating links. This link is not verified.  Search the "title" EDN for new link.
High-speed pulse modulator retains signal envelope -  06-Aug-09 Issue of EDN  The circuit in Figure 1 enables you to convert an arbitrary, relatively slowly varying voltage waveform to a new waveform in which the instantaneous values of the original waveform alternate with positive and negative signs. The new waveform retains information about the original waveform, …. [Design Idea by Marián Stofka, Slovak University of Technology, Bratislava, Slovakia]
High-Voltage DC Generator -  As one who supplies parts to those who experiment with high voltage, I get a lot of letters and phone calls from frustrated builders that go like: "Can you supply an inexpensive xxx microfarad capacitor at a working voltage of YYY? My only source wants $249 for one."  Sometimes, a high price is justified; other times, a seller has the only capacitors of a special value available, and will soak you for the maximum dollar.…. [Tony van Roon's circuit]
Load Pulser Tests Supply's Transient Response -  04/11/96 EDN-Design Ideas.... Modern µPs place severe demands on the transient response of the power source. For example, Intel's P6 specification stipulates an output-current capability of at least 30A/µsec while maintaining output-voltage regulation within specified limits.... EDN is migrating links. This link is not verified.  Search the "title" EDN for new link.

Pulse Generator Circuits:  #'s - L      M - Z


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