Here is a phone from the mid 90s, the Ericsson GA628. Here visible is the front of the unit with keypad, & single line monochrome LCD for number display.
Here the battery is removed from the phone, showing the SIM card socket. At the top under the antenna stub is the socket for an external antenna.
Here the front is removed from the phone, PCB on left, rear of keypad on right. Microphone is at bottom of keypad, with speaker at the top. Top right of the PCB is the ringer buzzer, left is shield for RF amplifier.
Here is the back of the main PCB, RF sections on left & centre. Processing & memory on right.
This phone had a Ni-Mh battery, before Li-Ion batteries were introduced.
The LCD from the front of the phone is shown here. A simple dot matrix single line unit.
This is a 1500W hairdryer, death caused by thermal switch failure.
This is the switch unit. Attached are two suppression capacitors & a blocking diode. Cold switch is on right.
Heating element unit removed from housing. Coils of Nichrome wire heat the air passing through the dryer. Fan unit is on right.
Other side of the heating element unit, here can be seen the thermal switch behind the element winding. (Black square object).
The fan motor in this dryer is a low voltage DC unit, powered through a resistor formed by part of the heating element to drop the voltage to around 12-24v. Mounted on the back of the motor here is a rectifier assembly. Guide vanes are visible around the motor, to straighten the airflow from the fan blades.
5-blade fan forces air through the element at high speed. Designed to rotate at around 13,000RPM.