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This is a spectacular but completely useless project. It lights Ultra-Bright LEDs in a sequence and each LED flashes brightly very briefly. The LEDs light-up going around and around since they are mounted in a circle (on a CD), then they pause before chasing again. The very brief flash of each LED (15ms) and the pauses (1 second) reduce the average current so the battery should last a long time.   For user convenience, this project has a stepper speed control and a brightness control. At slower speeds and/or reduced brightness, the battery’s life is extended considerably. At full brightness, the LEDs flash extremely brightly. More than one of this project grouped together occasionally synchronize, lighting the whole room for a moment. Operation At maximum speed, the LEDs don’t appear to flash, instead they appear to move from one lighted one to the next, around and around. They rotate completely for 4 rotations in two seconds, and then turn off for a one second pause then rep...

This 16 LED Chaser Circuit Diagram is a double direction flash. Similar to Digital Ping- Pong 1, there is a movement of a lit dot, up and down along the LED's length. 16 LED Chaser Circuit Diagram When the D16 lit the situation changes and there is a reverse movement. Lit D15-14 ……D16, is lit making circles when the circuit is under power. The IC1 is an unstable flip- flop supplying with stable frequency pulses (the frequency can be changed by TR1, adjusting the velocity of the LED's up and down). This frequency supplies the IC3 (which is a 4-Bit UP and DOWN counter) through 2 gates A-B of the IC2. The output counter supplies the IC4 that is the driver of the LED's. The parts C- D of The IC2, make a R-S flip- flop, that changes situation, when the edge LED's D1 and D16 lit. We have an electronic limit for the situation change. In proportion the shape we make with the LED's, we can have the proportionate optional result, making various effects. Part List R1= 100Kohm...

Description: The heart of the LED chaser is the 'PIC16F628A' microcontroller, IC2. The program that runs on this chip controls the LEDs attached to the output port pins. Resistors R1 - R8 limit the current through LED1 - LED8 to a safe level. Resistor R9 provides a pull-up for the input connected to switch S1. Schematic: click on image to zoom Components: Resistors, R1 - R8 330 ohm 0.25W Resistors, R9 - R10 10k ohm 0.25W IC2 PIC61F628A Socket for IC2 Red LEDs (8) S1 Push Switch 5v Power Supply Schematic: Components: Capacitor, C2 100nF 5v Dielectric Ceramic Capacitor, C3 220nF 5v Dielectric Ceramic Jp2 Single row PCB header plug IC1 LM7805 5v voltage regulator Hex code: Note: Just copy the below code and paste it in notepad and save it with '.hex' extension, as chaser.hex. :020000040000FA :02000000B52821 :08000800BB00030EBC000A0856 :10001000BD00831264009D3081070B11E220B50BF7 :1000200017283230B500B715AA03031937143D0855 :100030008A003C0E8300BB0E3B0E09003520B71...