This additional bell circuit was found in the February 1994 Electronics Now magazine. The transistors are common, and the circuit is for analog lines.
The transistors of this amplifier for 8-200 headphones may be the BC548 or equivalent to replace...
TDK's TAS Series Magnetic Angle Sensors can be obtained from Mouser Electronics. The components...
This circuit flashes a neon lamp from a low voltage source of 6 to 15 V. The transformer is low...