Category Archives: Arduino

Unusual meetup today, usually we talk electronics, today we talked mostly 3d printers. Someone brought in this gem It is a 3D printer that works by flashing an image on to resin while the platform sinks at each layer. It … Continue reading →

This is just for those superhet 433Mhz Receivers. I tested one yesterday with a 3.3V VCC and I did not see it go over 3.3V. I don’t have it in the image above but I put a 3.3v to the … Continue reading →

Getting a secondary transmitter up.  The other one seems to go offline, hoping the new one works better. Initially it works, hopefully it works tomorrow.

I like this setup. It is small and uses less parts.  I can pass on the cheaper modules if I need to.  It is so much easier to set up, it is worth the higher cost.  

This is fun, I finally got the device to configure via web page. I was able to get this working right. Looks good, cleaning up the code to get it to work with some errors.    

Recall my past few posts and I been mentioning the use a of a 433mhz receiver. On this picture the three on the left are Superheterodyne and the one on the right is a Super-regenerative The superhet is supposed to be better … Continue reading →

Soon. I need to start off simple, but I have a feeling things going to move fast and I need infrastructure. Where to sell, (offerup, craigslist) How to take payments How to market My supplies. I think tomorrow I will … Continue reading →

Here is the bill of materials for the 433Mhz Wemos Gateway, prices are from ebay US Sellers. Wemos D1 Mini           7.85 400 Tie point (half) breadboard           5.09 433Mhz Receiver           5.15 2n7000 mosfet           0.15 2x 10k Ohm … Continue reading →

I was trying to get the 433Mhz receiver to work with the ESP8266. Apparently, the issue is that there is a strict timing issue and stuff needs to come from RAM. Here is the article https://github.com/sui77/rc-switch/issues/46 So it is not … Continue reading →