To build the dispenser, we just need a 1mL injection syringe, a wooden stirrer, a glue gun and strong yarn. Drill 1.5mm holes in the wooden stirrer for the yarn. Mount the yarn and glue everything together with a glue gun, the picture explains everything. The needle should be shortened. Do not cut it, but bend it with two pliers back and forth until it breaks.
Precisely dispense the smallest amount of solder paste
Spot welder parts for sale
You can order here a high quality PCB of the spot welder controller, a programmed ATMEGA328 Arduino chip with the welding software and some parts that are hard to get. So you don't have to know anything about the Arduino, software or electronics. All you need to do is to solder all the components, connect the board, then power up and press weld button.
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.
To be able to modify and repair the Chinese KU63 e-bike motor controller I have redesigned it. The KU63 may also give insight into other Chinese motor controllers.
Switches and push buttons need debouncing. It is straightforward to do this with software, using a library. The advantages of the Switch library are: