Timer Controlled Fitness Gym Application Circuit

In this post I have explained how to make a timer circuit for fitness, or gym workout application. The idea was requested by Mr. Jan.

Circuit Objectives and Requirements

I need a circuit diagram for a timer which is used in a fitness gym. It consists out of 5 x incandescent (5 channels) 220V colored bulbs which switch on in sequence, but stays on until the entire sequence is completed. It then resets and the entire sequence is repeated indefinitely.

In the gym the lights are used for circuit training. There are about 15 different exercises available. So the 15 people will each choose one of the 15 exercises. For instance you will select to do the cycling exercise, I will select the rowing exercise and so on until all 15 people have chosen a specific exercise to do. When the lights go green(channel 1) a beeper sounds and everybody start exercising until all four green(channel 1-4) lights are on. When the red(channel 5) light goes on a beeper will sound and you stop exercising. This is resting time and now you also change over to a different exercise. When the green light(channel 1) goes on again you start again. And so you continue until you drop dead. HA-HA

To sum up, this timer circuit for fitness gym application should function as follows:

1. Bulb No. 1 will go ON & stay ON for entire sequence

2. After approx. 20 sec Bulb No. 2 will go ON & stay ON for entire sequence

3. After approx. 40 sec Bulb No. 3 will go ON & stay ON for entire sequence

4. After approx. 60 sec Bulb No. 4 will go ON & stay ON for entire sequence

5. After approx. 80 sec Bulb No. 5 will go ON & stay ON for entire sequence

6. The unit will reset and repeat the sequence indefinitely

The overall timing should be adjustable. Not necessary to adjust individual channels.

The Circuit Diagram

Warning: The Circuit is Not Isolated from Mains AC, and therefore is extremely dangerous to touch in an uncovered, switched ON position. Proceed with extreme caution while testing this circuit.