Mobile Phone diagram

Darlington phototransistor type light-sensitive switch control circuit application. The Darlington type phototransistor serves as a sensitive element, capable of detecting low light levels for the detection of reflected light signals. The Darlington phototransistor circuit utilizes a pair of transistors configured...

Here is a circuit of an offline telephone tester which does not require any telephone line for testing a telephone instrument. The circuit is so simple that it can be easily assembled even by a novice having very little...

The circuit provides an 8-ohm output for connecting communication receivers and low-impedance speakers or headphones, featuring harmful interference suppression for continuous random voice transmission. The passband ranges from 55 to 2530 Hz with a 3 dB bandwidth. Inductors L1...

A reflex isolator detects the presence of an object by reflecting light from the object back to the sensor. This technique is effective when an object is in close proximity to the sensor. Reflex isolators, also known as proximity sensors,...

This power supply employs two VN400A 400-Volt MOSFETs arranged in a half-bridge configuration. The outputs provide +5V at 20A and +15V at 1A. Low-current outputs utilize three-terminal regulators, allowing for either 12 Volts or 15 Volts to be achieved...

The vehicle is a 1968 Ford equipped with a 1972 engine. The original alternator has been replaced with a new unit. It has been suggested that reversing the polarity of the voltage regulator is necessary for the alternator to...