Electronic Circuits and Projects Forum

Hi all, im please I found this place I could do with some help.

Id like to design a little led circuit for my scalextric pit lane that is activate when a car enters the pits.
Here is what id like to do:



For now ignore the track flipper section, all i want is the lighting circuit activated by a car driving over a switch or sensor and reset when it leaves the pit.

Ive been using a java online breadboard but not had much luck myself. All help is greatly appreciated. Any questions please ask.

hello anyone?lol

From what I understand is
This is a slot car track?
When car is in pits you want a red LED on
When pit is empty green LED on
If pit is closed a flashing LED

This circuit sonds very much like the model railroad circuit I and several other members have been working on.
Let me find the post and circuit link
will get back to you

here is the basic circuit. just need to add a flashing LED
circuit is pretty simple

Simple Railroad Signals

Thanks for the reply.
No car in pits = GREEN LED entry ON, GREEN LED exit ON
Car drives over switch/sensor and enters pit lane = GREEN LED entry OFF, RED LED entry ON and flash, BLUE LED ON and flash, GREEN exit OFF
Car drives over switch sensor at end of pit = RED LED entry ON and continues flashing 10 Seconds, BLUE LED OFF, RED EXIT LED ON and flash 10 seconds
Car now totally clear of pit, after 10 second flashing system reset.

Hope that makes it a little clearer, il have a look at the link and see if i can make sense of it lol.

what type of switch/sensor would i use? I wanted to fix a switch under the slot the car guide blade sits in so it pushes the switch closed when it passes over it.

If you want help then draw an actual schematic using a schematic drawing program or draw one but make it very clear what you have.
the breadboard pic dosn't tell me anything except you have a 7408 and a clk???
if you use the schematic in the link I posted you will see how it works. breadboard it then run try it out.
the flashing led is a minor issue. WHAT EXACTLY do you want to happen??

Thanks for the reply. I have never used a schematic drawing program before so i will have a go and see what i can do. I have only a little knowledge on building circuits so please be patient with me.

curious what or where did you get the idea to use the 7486 and a 555? timer for clk.
f you can explain clearly what you want the circuit to do?
green = pit open
yellow = pit is busy
red = pit is full
how many cars etc??

It may not be perfect but its a start hope it helps and that it makes sense