This circuit was found in a PE Hobbyst Handbook of 1989. It uses a black light fluorescent of the time. Small fluorescent black light from 1 to 4 W can be used.
This circuit from a Radio Electronics from December 1974 was used in color televisions of the...
This network can be used in a sound project to control the tone. The circuit is from an...
The circuit shown in the figure is suggested by Texas Instruments and allows data transmission on TTL devices...