# LED strobe effect

Discussion in 'The Projects Forum' started by zidan3, Jun 17, 2010.

1. ### zidan3 Thread Starter New Member

Jun 16, 2010
6
0
good day..i'm having trouble making a circuit for my rc car. honestly i dont have any idea how to do this..

here's my plan:
group1 = 1x5mm LED + 1x3mm LED
group2 = 1x5mm LED + 1x3mm LED
*all are bright white

I wanted to put 4 led for my rc's headlights with strobe effect.when i switch it on group1 flashes first 3 times before group2 flashes 3 times also.and process continues. switch it again and both groups goes steady. switch it again and it goes off.

i'm a total noob about electronics but i wanted to try this one out. can anyone provide an exact diagram for this.

thanks so much.

Last edited: Jun 17, 2010
2. ### Bernard AAC Fanatic!

Aug 7, 2008
4,551
477
Study the post by kuxz2008, top of page upper right find white box, fill in and hit find.

3. ### Bernard AAC Fanatic!

Aug 7, 2008
4,551
477
Now that you have digested the preveous post ref. here.s one attempt to solve the RC car lights. Q3 supplies 3 sequential pulses , OFF, PULSES, ALL ON. At reset Q2 & Q3 "0" pin2, are high. Q3 pin 2 is inverted & inputted to Neg. NOR gate Q10. If all inputs to Q10 & Q9 are high. out is low; if 1 or more inputs go low out is high-giving NOR function from NAND . I cant even copy right, leave out Q6, Q3-2 to Q10-13. With Q10-13 & Q9-5 hi out is lo to both gates ,LED'off. Skipping to ON, operation is the same except signal is inverted, causing LED's to be on. In Pulse position, Q3-1 is hi, disabling Q1 & Q2 resets. Q1 starts free-running outputting clock pulses at pin 3. The 8 sequential pulses from Q2 are diferentiated OR'd & shaped by Q7 & Q8,first giving 3 neg. going pulses at pin 8, second , 3 neg pulses at pin 10. The pulses are inverted by Q9 & Q10, driving FET gates positive, flashing LED.s. Need information on operating voltage, & nature of control switch. Will also need a small shoe-horn to get it all in.

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4. ### zidan3 Thread Starter New Member

Jun 16, 2010
6
0
thanks so much sir..i'll try to study it..