Recent content by Colinpc

I am interested in using a Li ion cell to power my project using a solar cell recycled from a garden light. It is Vo/c 7v and Is/c 70mA. As this would potentially damage the cell or project, I will be regulating to 4.0v using a TL431. This allows me to set the voltage by a couple of resistors...

As the Picaxe can run at lower than 3.7v, the Li Ion has good potential. The problem is safely charging the cell. Many Li Ion cells have a regulator built in. Its purpose is to stop over charge and over discharge. It is a small disc on the -ve end of the cell. Not all have the regulator, those...

This piece of code turns pin 2 on and off for 20 secs each when setint is commented out. When coded as below, the output is on for 20secs and off for 3secs. I have run it on 08M and 08M2 with same result. I would appreciate and help on why. Fred symbol timeon = 20 'time on for fan in...

I came across this IC that appears to be a good solution to interfacing Picaxe to I2C bus devices of lower voltage. The device is ADuM1250 and available from RS...

I am in need of a sensor that can be buried under a farm road next to the gate. I thought that a magetic sensor would be ideal. My theory is that a car travelling over the sensor would give a sufficient change to be able to be processed by a Picaxe and notify the owner of visitors. There are a...