This circuit is from a 1965 Electronic Design. The transistors may be general purpose and the power supply must be symmetrical.
May 2017 - Mouser Electronics already has for sale the new Littelfuse SP2555NUTG diode arrays for...
This circuit of a 1991 PE Hobbyst Handbook allows the brightness of the incandescent lamp to be...
This circuit was obtained in a 1980 publication, but it can be easily assembled today, as all...