Now come to the main query, you can earn money on techulator through various ways. I strongly recommend you to read this thead - Ongoing awards and rewards in techulator.
Here are some more resources you should read - Adsense revenue sharing and Infolinks revenue sharing programs.
You should read help section for more information on content posting guidelines.
As for writing articles, since you have blogging experience, it should not be a problem to you.
Search this forum and you can find threads related to revenue and reward programmes, content posting guidelines and various article writing contests on Techulator. Welcome to TEC and have pleasant experience here.
Live....and Let Live!
First of all accept my warm welcome over here. This is really a great website to earn as well as learn. I suggest you to go through the following resource to understand the techulator better and learn about the top section in here and their usage to earn points and cash.
Top sections of Techulator.com- A beginners' guide