seen from Israel
seen from Netherlands
seen from South Africa
seen from Ukraine
seen from United States
seen from United States
seen from France
seen from Japan
seen from Sweden
seen from Spain
seen from Spain
seen from United States
seen from Türkiye
seen from Russia
seen from Australia
seen from France
seen from China
seen from China
seen from United States
seen from United States
555 Timer Oscillator
A voltage-controlled oscillator (VCO) using the 555 timer is shown in figure.
The circuit is sometimes called a voltage-to-frequency converter because the output frequency can be changed by changing the input voltage.
As discussed in previous blog posts, pin 5 terminal is voltage control terminal and its function is to control the threshold and trigger levels. Normally, the control voltage is…
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Police siren using NE555
Police siren using NE555
A lot of electronic circuits using NE555 timer IC are already published here and this is just another one.Here is the circuit diagram of a Police siren using NE555 timer IC. The circuit uses two NE555 timers ICs and each of them are wired as astable multivibrators.The circuit can be powered from anything between 6 to 15V DC and is fairly loud.By connecting an additional power amplifier at the…
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