More about circuit (738)

1-07-2010 | On a sailboat, the condition of the battery is a major concern for obvious reasons. On the author’s boat, a 120 Ah lead-acid battery is char...

1-07-2010 | Most hobbyists will have some tools that are battery-powered, such as a drill, screwdriver or power scissors. Unfortunately (and especially...

1-07-2010 | Many enthusiasts will be using their PCs as data loggers, controllers or as web servers. In these cases it is important that the machine is...

1-07-2010 | One solution for increasing the power of an amplifier running on a low-voltage supply, like a car radio powered from at best 14 V, is to use...

1-07-2010 | If you’re short of inputs on your amplifier, but it has an input for a magnetic pickup with RIAA correction, this very simple project will l...

1-07-2010 | The compact circuit presented here is perfect for receiving the signals from pulsed fixed-frequency transmitters. Chest straps from several...

1-07-2010 | The AC powerline indicator presented here has a complete galvanic isolation from the grid. The indicator is an LED that lights up when a cur...

1-07-2010 | This circuit lets you control a pump, to keep the level of water in a cellar below a certain threshold, for example. Power is supplied to th...

1-07-2010 | This development board around a 68HCS08DZ60 microcontroller from Freescale aims initially to be a platform for experimenting with the CAN bu...

1-07-2010 | This mousetrap is built around a PIC12F683 and uses an infrared transmissive optical sensor that is modulated at a frequency of 38 kHz, so t...