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Siren Circuits using timer 555 – Circuit Schematic
Siren Circuits using timer 555
his month I am making 3 different types of siren circuits based on the 555 timer. The first circuit simulates the siren of a British police car. It uses two 55...
Morse Code with touch button (555) – Circuit Schematic
Morse Code with touch button (555)
This simple CPO is for those who want to practice Morse Code in a different way, ie with out the morse key. It can be also used as a touch operated door bell. T...
Traffic Lights-LEDS – Circuit Schematic
Traffic Lights-LEDS
The 555 timer IC is connected for Astable Operation, the clock pulses are fed to the 4017 IC via the 10K resistor. The 4017 is a 10 stage counter, therefore the...
Stroboscope with 555 timer – Circuit Schematic
Stroboscope with 555 timer
This circuit enables observation of movement between other stroboscopes. Generation of rectangular signal is based on NE555. This circuit requires a low power s...
1 button ON / OFF Switch with 555 – Circuit Schematic
1 button ON / OFF Switch with 555
This project describes how to build a "soft touch" switch. By "soft touch" we mean that you have to push once to set device ON and push again to set device OFF....
555 timer Pulse generator – Circuit Schematic
555 timer Pulse generator
Pulse Generator kit will generate a frequency in KHz which can form a good test gear project. This kit is based on the classic LM555 timer IC. Input - 12 VDC M...
Stopwatch 0-99 seconds (MC14518B) – Circuit Schematic
Stopwatch 0-99 seconds (MC14518B)
The circuit that has been used is shown in picture 1. Through the experimental part we will explain each of the parts function, but in order to have a notion of...
Stopwatch 0-99 seconds (MC14518B) – Circuit Schematic
Stopwatch 0-99 seconds (MC14518B)
The circuit that has been used is shown in picture 1. Through the experimental part we will explain each of the parts function, but in order to have a notion of...
555 stepper pulse generator – Circuit Schematic
555 stepper pulse generator
The 555 Stepper Pulse Generator kit will help you with the pulse required to drive your favorite DC Servo Motor application. This kit uses the famous 555 timer...
Simple 555 Timer Monostable Circuit
The two circuits below illustrate using the 555 timer to close a relay for a predetermined amount of time by pressing a momentary N/O push button. The circuit o...
Beeper Circuit – Circuit Schematic
Beeper Circuit
This box is a portable transfer standard to maintain and carry with you a local time signal of 59 short beeps (pips) plus a long 0.4 sec beeeeep on the full min...
Beeper Circuit – Circuit Schematic
Beeper Circuit
This box is a portable transfer standard to maintain and carry with you a local time signal of 59 short beeps (pips) plus a long 0.4 sec beeeeep on the full min...
Turn an old PC into a multi-channel pulse generator, for PWM/servo/stepper – Circuit Schematic
Turn an old PC into a multi-channel pulse generator, for PWM/servo/stepper
PulsePar turns a PC into a multi-channel pulse generator utilizing the parallel port. The period, duty and phase of each channel are adjustable so as to be used...
sound detector switch – Circuit Schematic
sound detector switch
When the 555 ic goes into timing mode (triggered by an output signal from the sound detector amplifier,) the timer`s output (pin 3) is set into HIGH for a durat...
Switch Debouncing – Circuit Schematic
Switch Debouncing
This circuit will remove the transient spikes and contact bounces from a non-latching push button switch. Using a 555 timer as a monostable circuit, it is easy ...
Timer LM555 Circuits – Circuit Schematic
Timer LM555 Circuits
The following are LM555 timer circuits that have unusual functions. Designed to time a sports event; In this circuit the GREEN output is adjusted to be on for 3...
Phototransistor 555 Timer – Circuit Schematic
Phototransistor 555 Timer
This page shows three circuits for using the 555 timer IC as a photocell controlled train detector. The circuit is shown driving light emitting diodes but ...
CA4060B Timer Circuits – Circuit Schematic
CA4060B Timer Circuits
No description available....
Circuit converts pulse width to voltage – Circuit Schematic
Circuit converts pulse width to voltage
The circuit in Figure 1 converts pulse information to a clean dc voltage by the end of a single incoming pulse. In another technique, an RC filter can conve...
Model rocket launch controller – Circuit Schematic
Model rocket launch controller
Eight LED`s are used to indicate the pad currently selected. These LED`s are connected to a decade counter, which sequences the LED`s when it receives a clock p...