August 2009

Posted on Feb 5, 2014

This device was designed on request and allows sequential operation of four Leds either to left or right direction, obtained by means of a 7555 CMos timer IC (IC1) wired as an astable multivibrator driving a Decade counter (IC2). This IC is set to count a sequence of four by connection of pin #10 to pin #15, but any sequence count in the 2-10 rang

August 2009
Click here to download the full size of the above Circuit.

e can be set by choosing the appropriate pin connection. Obviously, LEDs, Transistors and their respective Base-limiting resistors must also be added or omitted accordingly. R1 is a variable resistor (Trimmer), used to set the desired speed of the LEDs. SW1 is a change-over switch that should already exist in your motorcycle, having a center-off position and Turn-left and Turn-right positions. D1, D3, D5 and D7 are the Turn-left LEDs; D2, D4, D6 and D8 are the Turn-right LEDs. IC1_7555 or TS555CN or TLC555CP CMos Timer IC IC2_4017 Decade counter with 10 decoded outputs IC SW1_Vehicle Turn Lights switch (See Comments) Battery_12V Vehicle battery This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively high power outputs, and a certain built-in degree of loudspeaker protection, due to capacitor C8, preventing the voltage supply to be conveyed into loudspeakers in case of output transistors` failure. The preamp is powered by the same 60V rails as the power amplifier, allowing to implement a two-transistors gain-block capable of delivering about 20V RMS output. This provides a very high input overload capability. R11, R12_R47 4W Wirewound Resistors C1, C2, C4, C5_47 µF 63V Electrolytic Capacitors C3_100 µF 25V Electrolytic Capacitor...

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    AVR Inductance / Capacitance meter II
    40W/8ohms Audio Amplifier
    EPROM adapter for ATMEL Programmer
    2x30watt home amplifier circuit
    Invert a 555 Astable Output Signal
    230 V 50Hz AC (or 110V 60Hz) Main Operated LED Powerful NIGHT LAMPCircuit
    Transformerless Power Supply
    Operational Amplifier Voltage Comparator Circuits
    Parallel port programming
    Simple RF Transmitter
    An estimate of the load current monitor circuit rod