The 60 Hz Frequency Generator circuit is very urgently needed to make the inverter or hardware related to the AC current voltage. This 60 Hz Frequency Generator is very simple and has a high accuration, the squarewave as the output which is precision.
The heart of this 60 Hz Frequency Generator is IC CD4060 as the IC Counter / Divider and also could be adjusted for the oscillator function. This IC and the crystal as the tank circuit, with the range of supply power from +5Vdc until +9Vdc. The tank circuit is formed by R1, VC1 and Xtal. VC1 as the tuning to make the value of the pulse frequency to get the best 60 Hz Frequency Generator.
This is Mini UPS using IC CD4047 Electro Suite, UPS (Uninterruptible Power Supply), is used to cope if the electricity goes out. Although not reliable as the original UPS, the circuit is a bit meaningless.
Simple and easy. The cost is relatively cheaper than buying the original UPS. The necessary components are also sold at many electronics stores.
This circuit has a power output of about 1.5 W. Before the main series there are a series of mini adapter that has a voltage between 9V/12V with a current of 500mA. The resulting voltage is used to operate the circuit and battery charge. The UPS is designed to keep electronic devices running despite power outages.
When the inverter is run with the AC input, and then converted into DC voltage. On the output rectifier is used to fill the battery. When a power failure or outage of electric current, DC voltage and then flows into an inverter that produces AC voltage at the output of the inverter.
The circuit is connected around the CD4047 IC that operates as a multivibrator at a frequency of 50 Hz. This multivibrator Q output drive MOSFETs IRF540. Inverter output is filtered and reduced use of MOV (Metal Oxide Vasitor). Transformer used is 9-0-9, 1.5A. Two LEDs (D6 and D7) are used as an indicator of whether the mains voltage or battery which is working.
Source : komputek – e-one-s
Rangkaian ini adalah Sirine Mobil Polisi Negara Inggris dengan IC 555, di sini kita menggunakan IC yang paling populer di dunia, yaitu IC Clock Generator 555.
IC 555 yang berada di sebelah kanan berfungsi sebagai pembangkit nada alarm, dan IC 555 yang berada di sebelah kiri berfungsi sebagai Multivibrator Astable 1 Hz.
Keluaran (output) pada IC 555 yang berada sebelah kiri adalah sebagai masukan untuk memodulasikan frekwensi terhadap IC 555 yang berada di sebelah kanan. Hal ini menyebabkan sinyal frekwensi yang dihasilkan bergantian antara 440Hz dan 550Hz dengan rasio putaran sebesar 1Hz.
Transistor 2N3055 berfungsi untuk membantu memperkuat sinyal ke speaker.
It uses two 555 timers in the circuit.
The 555 on the right is wired as an alarm tone generator and the second 555 timer on the left is wired as a low frequency astable timer which generates a ramp waveform of about 6 seconds that is buffered by the transistor and again used to frequency modulate the tone generator.
The transistor is used to help strengthen the signal to the speaker
The first circuit simulates the siren of a British police car. It uses two 555 timers in the circuit.
The 555 on the right is wired as an alarm tone generator and the second 555 timer on the left is a 1 Hz astable multivibrater.
The output of the left timer is to frequency modulate the right timer.
This causes the right timers frequency to alternate between 440Hz and 550Hz at a 1 Hz cyclic rate.
The transistor is used to help strengthen the signal to the speaker.