How to

Acupuncture point locator

This circuit is used to locate the sensitive acupuncture points on the human body. Acupuncture belongs to the traditional alternative medicine. This healing method require the knowledge of the correct location of the important ponts of the body. Traditional acupuncture specialists rely on their expert knowledge to locate these points. Many of them also use [...]


How to solder SMD chips

How to solder SMD Chips by practice. At first, I tinned all the circuit board pads for the SMD chips before trying to mount them. That was a mistake. With both pads for chip tinned, heating up one end of the chip caused the situation in Figure 5. When heat was applied to the other [...]