In this post we learn how to make a timer circuit for fitness, or gym workout application. The idea was requested by Mr. Jan.
Adding Delay Timer to Gym Equipment
Dear Swagatam, 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.
Attached is a photo of this unit.
Your assistance will be greatly appreciated.
Kind regards
Jan
The Circuit Schematic
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.
Prashant says
Hello Swagatam,
I am big fan of your blog. I have tried many circuit and I have successful implemented water overflow circuit. which help me save 7300 ltr water per year.
Happy to write you again. My requirement is like, I want my wifi router should be switch off after 12 ( In Night) and switch on in morning 6 am. can you please provide any circuit for this.
Regards,
Prashant.
Swag says
Thank you Prashant, I am really glad you are finding my circuits useful.
for the present requirement, you could try the following concept and set the respective pots for the required ON OFF intervals
https://homemade-circuits.com/how-to-make-simple-programmable-timer/
Kenneth Walter says
Hi. I need to install a siren at a school, that goes off every 30minutes for 15seconds, from 8:00 in the morning until 15:00 in the afternoon.
Can u pls help me?
Swag says
Hi, you can either try the following first configuration, and use it by manually for switching it ON once in the morning and manually switching it off in the evening, or use the second link for a complete automatic actions:
https://homemade-circuits.com/how-to-make-simple-programmable-timer/
https://homemade-circuits.com/automatic-programmable-school-bell/
Tal says
Hi Swagatam
About this project “Timer Circuit for Fitness Gym Application”.
A warning message must be written that mains is all over the circuit beacuse there is no isolation transformer.
Anyone tuching any component will suffer from the electric shock.
Your blog is very usefull and intersting ! Thanks.
Swag says
Thank you Tal, I am glad you liked my site. and yes I have added the warning notification in the article.