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pcb How to use the same switch to control LED and vary resistance – Circuit Schematic
pcb How to use the same switch to control LED and vary resistance
I have a 4 position slide switch according to the position of the slide switch, I should turn on different colored LEDs and also vary the output frequency of 55...
Invert a 555 Astable Output Signal – Circuit Schematic
Invert a 555 Astable Output Signal
A variable frequency, variably duty cycle 555 configuration in astable mode. I`m using a set of pots to get a wide range of control. It works beautifully. The o...
ac What is the output voltage of this 555 timer high voltage circuit – Circuit Schematic
ac What is the output voltage of this 555 timer high voltage circuit
Calculated the output of the transformer to be 125 times (1000 / 8) higher than input. Since 12v is given as input, output should be 1500v (not sure about this)...
pcb design Need second set of eyes on 555 50% duty cycle soldered protoboard – Circuit Schematic
pcb design Need second set of eyes on 555 50% duty cycle soldered protoboard
Bold lines are soldered connections, arrows are wire based connections. Red for V_cc, Black for ground, blue for intermediate connection and gold for primary ou...
Getting more amperage from a 555 output – Circuit Schematic
Getting more amperage from a 555 output
A drink mixer inspired by BAR2D2, I am using a gravity fed pump that is capable of running on a 9v battery. I am using a circuit with a 555 timer to control how...
timer Simple Metronome Circuit w/ Linear Pot Control – Circuit Schematic
timer Simple Metronome Circuit w/ Linear Pot Control
To get the usual BPM range for music of between 40 and 240 BPM, that corresponds to periods of 1500 ms and 200 ms respectively. A BPM of 120 is exactly 500 ms. ...
digital logic purpose of diode in this 555 timer application – Circuit Schematic
digital logic purpose of diode in this 555 timer application
Make a 555 timer base circuit such that O/P pin of 555 is held LOW by default at power on, and the I/P pin is held initially at HIGH at power on. The main requi...
What is the purpose resistors and capacitor in this 555 circuit – Circuit Schematic
What is the purpose resistors and capacitor in this 555 circuit
It`s a typical AMV (Astable MultiVibrator) setup. The capacitor gets charged through both resistors until 2/3 Vcc is reached (internal comparator level). This s...
design Functional difference between various astable 555 circuits – Circuit Schematic
design Functional difference between various astable 555 circuits
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What do I need to close an electrical circuit for a certain amount of time – Circuit Schematic
What do I need to close an electrical circuit for a certain amount of time
The old 555 timer will certainly work given the specs you provided, and that`s the way to go if you are sure this is precisely the problem you want to solve. By...
Where is the oscilator in the 555 chip provided here – Circuit Schematic
Where is the oscilator in the 555 chip provided here
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Why are 555 IC pin diagrams so random – Circuit Schematic
Why are 555 IC pin diagrams so random
Can I assume that most of the 555 chips from different manufacturers are interchangable (same pin configuration), however the programs/diagrams have pins that w...
555 LED Pulsing Breathing Circuit – Circuit Schematic
555 LED Pulsing Breathing Circuit
Here is a circuit for simulating breathing / pulsing LED with the 555 timer chip. It became very popular and i received many comments and emails with people tha...
555 Timer IC for Square Wave Generator Application – Circuit Schematic
555 Timer IC for Square Wave Generator Application
You can start to set your Square Wave Generator up using 555 timer IC through the circuit shown above. Find it match with the pinout of 555 timer IC. The oscilo...
Beeper Using 1C 555 – Circuit Schematic
Beeper Using 1C 555
Here is a `beeper` circuit employing two 555 ICs. It can be used in various circuits (having supply voltage of 5 to-15V DC) that require an alarm or a `beeping`...
High-voltage power pulse circuit – Circuit Schematic
High-voltage power pulse circuit
Fast rise-time high-voltage pulses have many uses ranging from EMC testing to device characterization. The simple, low-cost circuit described here deals with th...
Create a flash-then-steady LED using a 555 timer – Circuit Schematic
Create a flash-then-steady LED using a 555 timer
The circuit shown flashes the LED briefly (to get your attention) and stays on as long as the power is on ( Fig. 1 ). The venerable 555 timer IC can be put to u...
Whats Better For Timing Chores: A 555 Or A Microcontroller – Circuit Schematic
Whats Better For Timing Chores: A 555 Or A Microcontroller
Micro or analog? These days it is getting harder to choose. The 555 timer was the benchmark of flexibility. How does it fare today?....
digital clock circuit diagram – Circuit Schematic
digital clock circuit diagram
This is a combination digital clock timer and solar panel charge controller used to maintain a deep cycle battery from a solar panel. The timer output is used t...
555 circuits 6 – Circuit Schematic
555 circuits 6
The heart of this circuit is IC No. 555. When the alert sound was working, even though the switch will continue to be the same, the sound still does not stop im...