Circuit Lake

This electronic project used to remote control and power on/off the PC. The extended guide for the infrared receiver with hardware side function to remotely switch the PC on and off as full USB variant is now available and got the name “USB Ultra infrared receiver” or briefly “USB Ultra IR”.
(more…)

Let’s build a simple digital oscilloscope.

• Single channel 100MHz/100MSPS (100 mega-samples-per-second)
• RS-232 based (we’ll look into USB too)
• Inexpensive!

A simple digital oscilloscope recipe
(more…)

There are serveral rs232 transceiver circuit which commond used for communicated between microcontroller and other devices such PC or any devices that use rs232.Here is a collection of rs232 transceiver circuits that popular for today.

2 transistor
The circit below use 2 transistor and some components to provide RS232 transceiver.It usefull for cheap application that dose not long lenght.

Fig 1. Transceiver with 2 transistor

(more…)

The “Birth Clock” is a fragile glass object containing a digital clock that is not working; it is designed to help you to come to a decision when you’re stuck at a specific point in life. Smash the glass, and the clock will start to work, leaving you with the broken object as a reminder of your dramatic decision. Leave the object as it is, and you remain out of time, having the beautiful object as a reminder of your resistance to change. What would you do?

Birth Clock [link]