New spot welder controller board
Because the electronics is difficult to built for many people there will soon be a printed circuit board available that contains all the required electronics.
Spot welder features
A fine-spot welder is one of the few equipment where building yourself is cheaper than buying. There are already published a lot of DIY spot welders, this one has some unique features:
Een van de mooiste fietstochten die ik heb gemaakt is de fietsroute lang de Maas van Maastricht naar Sedan in Frankrijk. Eerst stroomt de Maas nog door het vuile industriegebied van Seraing, maar stroomopwaarts wordt het stroomgebied steeds natuurlijker.
Cheap precision multimeter calibration reference
I have developed a cheap multimeter calibration reference by which you can calibrate a digital multimeter yourself. Here we calibrate my favorite multimeter, the PeakTech 2010, it has a lot of features and it cost just €35.
Switches and push buttons need debouncing. It is straightforward to do this with software, using a library. The advantages of the Switch library are: