| Many projects that flash, beep, move or do weird things have become Elektor classics and were published mainly in the Summer Circuits editio...
Ludwig Libertin (20)
| With the help of just a handful of components you can create a blue flashing light for use in model ambulances or police cars. Two blue LEDs...
| This is a design for a rear bicycle light that automatically switches on and off according to ambient lighting conditions. The red LEDs flas...
| The key advantage of this project is that the TUT (transistor under test) is pressed hard onto three PCB tracks that lead directly to socket...
| The circuit takes the ambient light level into account and only turns on the light when it becomes dark. The light is turned off when no cyc...
| We described the £10 ‘Tom Thumb’ R8C microcontroller starter kit in the February 2006 issue of Elektor Electronics. A disadvantage of this m...
| The technical demands on microphones used with radio equipment are not stringent in terms of sound quality: a frequency response from around...
| Some circuits need a negative supply voltage that only has to supply a small current. Providing a separate transformer winding for this (pos...
| Two multivibrators with different frequencies can be built using the NAND gates of a 4011 IC. If the output of IC1.B is positive with respec...
| A motorcycle or boat battery that is not needed over the winter is usually charged before being put away for the winter, after which it rema...