Wiring Diagram

Teks|Huruf Berjalan Sederhana

This is a running message display circuit wherein the letters formed by the LED arrangement
light up progressively. Once all the letters of the message have been lit up,
the circuit gets reset.

The circuit is built CD4017BC counter menggukan decades. One of the CD4017BE's features is
its provision of ten fully Decoded outputs, making the IC ideal for use in a whole range of
sequencing operations. In the circuit only one of the outputs remains high and the other
outputs switch to high state successively on the arrival of each clock pulse.
The timer NE555 is wired as a 1HZ astable multivibrator which clocks the IC2 for sequencing
operations. On reset, output pin 3 goes high and drives transistor T7 to 'on' state.
The output of transistor T7 is connected to letter 'W' of the LED word array and
thus letter 'W' is illuminated.

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On arrival of first clock pulse, pin 3 goes low and pin 2 goes high. Transistors T6 Conducts
and letter 'E' lights up. The preceding letter 'W' also remains lighted because of forward
biasing of transistor T7 via diode D21. In a similar fashion,
on the arrival of each successive pulse, the other letters of the display are also illuminated
and finally the complete word becomes visible.

Fuse (sekring) electronic designed to operate on 230V AC with an adjustable trip current.

This circuit connects directly to 220-230V AC which can be lethal! Please do not attempt to build any of the circuits/projects unless you have the expertise, skill and concentration that will help you avoid an injury.
    * D1: 1N4001
    * T1: TIC225M
    * T2: BTA12-600CW

Datasheet LCD 4 Digits SP521PR,
This is the TN (Twisted Nematic)-type liquid crystal display. It is possible to 4 digits display but the display of the maximum figure is only "1". It isn't possible to work continuously in the direct current. However, when applying the about 5-V DC voltage between the backplane (common) and the terminal, the color of the segment which corresponds can be temporarily changed to the black. With this, the correspondence of the terminal and the display segment can be confirmed.

Datasheet LCD 2 x16 (HD44780U),
HD44780U dot-matrix liquid crystal display controller and driver LSI displays alphanumerics, Japanese kana characters, and symbols. It can be configured to drive a dot-matrix liquid crystal display under the control of a 4- or 8-bit microprocessor.

HD44780U can display up to one 8-character line or two 8-character lines. The HD44780U has pin function compatibility with the HD44780S which allows the user to easily replace an LCD-II with an HD44780U. The HD44780U character generator ROM is extended to generate 208 5 ´ 8 dot character fonts and 32 5 ´ 10 dot character fonts for a total of 240 different character fonts. The low power supply (2.7V to 5.5V) of the HD44780U is suitable for any portable battery-driven product equiring low power dissipation.

DC to DC converter can provide up to 24V from a 12V volt DC. It can be used to run radios, small lights, relays, horns and other 24V accessories from a 12V vehicle with a maximum draw of about 800mA. It can be used to charge one 12V battery from another, or step up the voltage just enough to provide necessary overhead for a 12V linear regulator.

This antenna radiates radio waves as strong to just two directions. The two parameters that need to be considered on an antenna is the polarization and penguatannya. Simply put, an antenna has a vertical polarization if the antenna is placed in a position perpendicular to the earth. Antenna with vertical polarization will produce radio waves with vertical polarization, too. In addition to vertical, there are also berpolarisasi horizontal antenna, the antenna plays when the field parallel to the earth.

This circuit uses low noise transistors are type types: BC 650 C but the transistor is hard to find, so you can replace it with 109 BC is no less good. This condenser mic element in it is a very sensitive microphone, and to use this mic condenser required voltage between 2-10 volts, for that we can resistors in series with 1K-10 K ohms, in the picture above the tide 1k ohms.