Race Track Grid Start Lights

Rating: 1.00/10 (86Votes cast)

Category: Microcontroller Circuits / PIC Microcontroller
This circuit is also crossed to: Led circuits , Game Circuits
Views: 5184
Rank: 0

When the circuit is first powered on LED's D2 and D4 light just to indicate the circuit is operating. When the start button (SW2) is pressed all the LED's turn off. They then illuminate sequentially at one second intervals until all five LED's are on. After a random interval between 0 and about 7 seconds the LED's extinguish, signaling the start of the race. Once the LED's have extinguished simply press the start button again to initiate another race start sequence. * The circuit is really quite simple. I tested it on a breadboard with standard 5mm red LED's using 220R resistors from a 5Volt supply. The one on the prototype board operates at 3Volts using two AA cells. I dropped the value of the LED c visit page.

* The circuit is really quite simple. I tested it on a breadboard with standard 5mm red LED's using 220R resistors from a 5Volt supply. The one on the prototype board operates at 3Volts using two AA cells. I dropped the value of the LED c http://picprojects.org.uk/projects/picprojects.htm#F1%20Style%20Race%20Start%20Lights

Related circuits

Frequency Locked Loop for HF

The principle of operation is quite simple, a counter measures the VFO frequency, the new reading is compared with the previously stored value and an adequate correction is applied consequently. This process has been implemented in the past using several discrete TTL logics, now a single...

Saving the OSCCAL value for PIC 12F629 / 12F675

The PIC 12F629 and 12F675 have a factory set oscillator calibration value written to the last program memory location during manufacture. When programming the PIC the programmer software should read this value out, merge it with the program data being written to the PIC, and then write it back.

IR Link PIC tranceiver

I just finished a half duplex serial asynchronous link from a simple PIC circuit to the RCX. It is able to receive codes from the RCX (or Lego RCX remote control) store them in RAM & EEPROM and transmit any IR op-code to the RCX in turn. Included in the firmware is a routine that takes any...

PIC Project #1 - RS232 to I2C Interface

The software sample is written in C for a specific application. A general purpose interface is not available at this time but is planned for the future. The information detailed here should provide the basic framework for designing and implementing your I2C application quickly and efficiently.

PICADC - a free, PIC based "intelligent" A/D converter

This is an old design. Some of the components may be difficult to buy. If you would like to build an even better and cheaper A/D converter, take a look at the new PICADC3 design. The PICADC is a simple 12-bit, 8-channel analog to digital converter (with 4 additional digital inputs), which may be...

Voltage programmable square wave generator

Here's another daft yet interesting PIC12F675 idea I came up with. When I wanted to show someone how logic gates worked I could only find a NAND gate which wasn't very handy for demonstrating AND's OR's, NOR's and ExOR's. I also wanted to have a play with the A/D converter on the 12F675 so I...

Comparison macro for PIC processors

If you ever get tired of trying to remember the subtleties of the "carry" status bit every time you want to use the subtract instruction to perform a comparison, the macro in Listing 1 can help. The macro contains all of the nuances, once and forever. The macro reads like a sentence: branch to...

Build a PIC controlled DDS VFO, 0 to 6 MHz

Almost any 2x16 character LCD module with Hitachi HD44780 controller chip will work. The LCD pin numbers on the schematic are not valid for all LCD modules. Please check the actual signal names on your particular LCD module. The selected DFCW frequency offset will be added to the output frequency...

Grid 2: Let's Play -- This is The Easiest Course So Far.... OH WAIT!! Part 4!