Pulse Train
This circuit has a rate multiplier using a 4093 Schmitt trigger as an oscillator, driving a 4017 decade counter. When a pulse p...
1Hz Timebase For Readout And Counter Applications
This counter makes direct readout of frequency-generating equipment very easy when a 1-H...
Full-Cup Detector For The Blind
At the heart of the Full-Cup Detector is a 555-oscillator/timer configured to produce a 15-Hz click, until ...
Sequential Led Flasher With Reversible Direction
A 555 timer clocks a 74190 up/down counter. The 74190 drives BCD decoder driver 7442. The ...
Duty-Cycle Detector
This circuit looks at the time an incoming pulse is high. If the incoming pulse is shorter than the adjusted (VAR1) pul...
Negative-triggered-touch-circuit
The 4047 is configured as a monostable multivibrator circuit or one shot that is set up to trigger on a negative-transition of the signal applied to its pin ...
One-shot-timer
This simple circuit consists of only two timing components Rr and Cr, the NE555, and bypass capacitor C2. While not essentiaHor operation, C2 is recommended fo...
Ua2240-staircase-generator
The uA2240 timer/counter, combined with aprecision resistor ladder network and an op amp, form the staircase generator. In the astable mode, once a trigger pul...
Hee-haw-slren
A pair of timer IC"s are the heart of a circuit that simulates the warbling bee-haw of a British police siren. One of the 555 timers, U2, is wired as an astabl...
Low-cost-line-receiver
This timer makes an excellent line receiver for control applications involving relatively slow electromechanical devices. ...
Cmos-short-pulse-generator
Comprising two low-power, CMOS chips, thepulse generator produces a precise pulse width in the 50 to 500 ns range. ICl is a dual monostable multivibrator (one ...
Wide-ranging-pulser
An output pulse"s characteristics depend upon two multivibrator"s timing components. IC1"s freerunning astable-mode frequency sets the pulse"s prf, ...
Very-low-duty-cycle-pulse-generator
Using a precision oscillator and a few CMOS counters, you can build a precise, very low dutycycle pulse generator. You can add as many counters as you desire...
300V-pulse-generator
In this TMOS pulser, a negative-going pulse is applied to Ul, a high-speed CMOS buffer, which directly drives the gate ofQl, an MTP3N35. If only a 100-V pulse ...
Slide-timer
This circuit will record commentary and/ or music on one track of a tape and put the beeps that change the slides on another track. Gate U2a is used to trigger...
Pulse-width-modulator
In this application, the timer is connected in the monostable mode. The circuit is triggered with a continuous pulse train and the threshold voltage is modulat...
Pulse-position-modulator
This application uses the timer connected for astable (free-running) operation, with a modulating signal again applied to the control voltage terminal. ...
Pulse-amplitude-discriminator
A 1-V amplitude pulse triggers SCSl, but has insufficient amplitude to trigger SCS2. A 3-V input pulse is delayed in reaching SCSl by the 10-KO and .001-!"F in...
Downbeat-emphasized-electronic-metronome
ICla and IClb form an astable multivibrator. The astable"s signal is fed to IC1c, also to the clock input of IC2, a 4017B decade counter. That IC"s QO through ...
Three-chip-ekg-simulator
Two 555s and a quad NAND-gate IC can simulate an electrocardiograph signal and a -y-wave radioisotope signal for applications in nuclear medicine. This circuit...