I finished my Mach 5 with working lights several months ago. http://www.modelcars...l=+mach +lights I would like to enter it in an upcoming show. However, I have several fears:
1. Will the 9 volt battery last the whole show?
2. Will the twin headlights generate enough heat to melt the headlight cover?
I would also like to:
1. Display the Mach 5 with the lights on and lights off.
2. Maybe add a little sizzle to the light show.
I though this kind of stuff was way out of my league, until I read an article by, and corresponded with Clyde Jones aka Zog. Clyde seems to know his way around electronics and electronic parts suppliers. Without his help, I probably would not have proceeded. I am in no way an expert on this stuff. I used Clyde's suggestions and did a little experimentation. These are my results. Use this info at your own risk.
Clyde suggested I needed a computer chip. Specifically a CD 4060. In geek speak the IC, CD 4060 is a 14-stage binary counter with Q1, Q2 Q3 and Q11 missing. The maximum division is 16,384 with Q14 going HIGH after 8,192 cycles and then LOW after another 8,192 cycles. It has internal components to create an oscillator. The CD 4060 is a CMOS chip. Minimum supply voltage 6v. Maximum supply voltage 15v. Max current per output 15mA. Maximum speed of operation 5MHz.
What does this mean to us model makers? If you are a modeler interested in making your creations come alive with blinking lights - marker lights, head or tail lights, strobes - this is a little chip that will do a lot of LED blinking for a very little money, power, or complexity.
The 4060 runs happily on 6 to 15 volts, and drives LEDs safely with only 12-15 mA (milli-amps) of current. Most LEDs thrive on 15 to 20 mA, so they are a bit dimmer then they might be otherwise, but they will not die from too much power and resistors are not needed. Your LEDs should last almost forever. Since the 4060 chip is a CMOS type, unlike some other chips, it uses very little power internally to run itself.
Another wonderful feature of the 4060 is they are cheap. $0.29 or less from some suppliers.
Clyde recommended and I successfully used:
1355 Shoreway Road
Belmont, CA 94002
Phone: 1-800-831-4242 their web address is exactly what you think it should be.
The Jameco part number for this little beauty is #13151. They cost 29 cents for less than ten, 25 cents for 10-99 units.
You will need two other components to make the 4060 work. A capacitor and a resistor. Both are quite inexpensive also. The capacitor Clyde recommended was a CER, 0.01UF, 100V, 10%, AXIAL X7R. I have no idea what this means. Luckily Clyde told me they are part number #546257 and cost 10 cents each for 10-99 units.
The last part needed is a resistor - usually a 470,000 ohm or 470 Kilo-ohm resistor, 1/4W, 5%. I bought an assortment of 540 resistors for $12.95. Jameco # 103166.
The capacitor and the resistor set the basic frequency and 4060 chip divides it down.
I bought a stick of 4060 chips, a pack of ten capacitors, an assortment of resistors, and two variable resistors (#182844 @ $0.75 each) as seen in the pix. Now let the fun, I hope, begin.
The 4060 chip is about 3/4" long and 5/16" wide. The chip is 1/8" tall but it is 9/32" tall including the wiring pins. See the first pix.
The second pix is a schematic of the 4060 with the pins numbered. This is the view from the top. The pins are pointing down. The notch is on the left.
You will see the positive pin on the upper left. The negative pin is on the lower right. The forth pin from the left on the top row is the reset pin. It is also a negative pin.
All the numbered pins are both positive and negative pins. Each pin goes from "positive to negative" rather than from "on to off". If you connect a regular light bulb to these pins it will stay lit continuously because it doesn't matter which direction the current is flowing. However, if you connect a polarized LED between pins, the LED will light if and only if the pin connected to its positive lead is positive and the pin connected to its negative lead is in fact negative.
Take a look at the last pix. There is a green conventional bulb. It works with current from either direction. The blue LED will only work when positive current is coming from the left or pin 6. The red led is turned around so that it will only light when positive current is coming from the right or pin 4.
So as pins 4 and 6 alternate not from "on and off" but "positive and negative" all three bulbs will react differently.
If pin 6 is positive and the 4 pin is negative: the green bulb will be lit, the blue bulb will be lit, and the red bulb will be unlit.
When the current alternates, pin 6 becomes negative while pin 4 becomes positive. Now the green bulb is still lit, the blue bulb is unlit, and the red bulb is now lit.
So as the current at the pins alternate between positive and negative current, the omnidirectional conventional bulb is always lit, while the unidirectional LEDs blink on and off with the direction change of the current.
So you're all asking yourselves how fast will things blink? The geek answer is each numbered pin indicates the frequency divide by pin level. Pin 4 divides the basic frequency by binary 4 (2 to the 4th power or 16). Pin 14 divides the basic frequency by 2 to the 14th power equals "lots" in layman terms, it could be 16,384, but does it really matter?
All us modelers need to know is the pin marked "4" is the fastest blinker - changes quicker, more often. The pin marked "14" changes slowest, least often. Each number pin changes half as fast as the smaller numbered pin below it in the sequence. Each numbered pin changes twice as fast as the larger numbered pin above it in the sequence. And by combining pins you get an awful lot of combinations.
So what is the basic frequency? This is set by the timing capacitor used. I tried the recommended 0.01UF (micro-farrad) timing capacitor and a 0.10UF capacitor. As you might guess the second 0.10 capacitor blinks 10 times slower than the 0.01 capacitor.
Like Face says, there is a very useful hand tool for working with these electronic components and wrapping wire. When I originally built the Mach 5 all the electrical connections were just bare wires twisted together by hand. I tried this with the 4060 chip. It can be done, but is hard to do. Using a wire wrapping tool is much simpler and makes the connections better looking and more reliable. I got my wire wrapping tool from Radio Shack. The first time I went there they said they didn't carry them. Then I saw them for sale on Evilbay and got the part number. I them called Radio Shack and they said they had two in stock. When I went to pick it up they couldn't find them. Luckily I knew what I was looking for this time and found them. They are part #276-1570. They cost $5.99, but can be bought on Evilebay for less than that delivered.
This style of wrapping tool contains a wire stripper inside the handle.
This pix shows the pretty tool wrapped wire on the right and the ugly hand wrapped wires on the left.
So let's make this chip work. The first step is to wire one end of the clocking capacitor to the pin labeled "out 2". Then wire one end of the clocking resistor to the pin labeled "out 1". Now Take a piece of wire and connect it to the pin labeled "CK". Finally connect the free end of these three components together. This completes the basic frequency clock. Your 4060 will now work if connected to a power supply.
Take a (red) piece of wire and connect one end to the positive (+) pin. Take the other end of the wire and connect it to the positive terminal of your battery. I am using a 9 volt battery. Using the racers credo that nothing is lighter nor cheaper than nothing, I drill a hole in each battery terminal and just wrapped the wire to the terminal. Way cheaper than buying a battery connector and takes up a lot less space. Now take a piece of (black) wire and connect one end to the negative (--) pin and connect the other end to the negative side of the battery. You should also connect a wire from the negative (--) pin and the pin labeled "R" (reset). I don't know why. I was just told to do it.
Now the 4060 chip is wired and functioning. If you touch the leads of a LED to almost any combination of numbered pins something should happen. Let's find out what in the next post.
Edited by Casey, 20 November 2012 - 09:00 AM.