| An LED slowly fading in and out is more attractive than a blinking one. Here is a circuit to do that using an NE555.
Andre_Ouaga (5)
| It's a Zener tester using a Nixie tube NE555 based power supply.
| This is a simple Adjustable Electronic Load using a LM317 and a MOSFET. It's ajusted with a potentiometer.
| This is a simpler version of BOB-SCAP, backup AVR programmer. There is no added hardware, the signals are reversed by software.
| It's a simple box with diverse inputs and outputs to help control easily V and A of a working device.