This trainer is a combination of two instruments.
1. Speed Control of DC Motor Transmitter Model EBS-24 and
2. DC Motor speed control trainer (for fiber optic applications) Model DSC-2

About the PIC controller: This trainer has a built-in PIC controller. It is programmed to accept 4 bit binary data as its input. The PIC is programmed to accept the status of these 4 binary switches and produces a PWM train of pulses at its output. This train of pulses is further processed through a fiber optic transmitter for onward transmission to a receiver using fiber optic cable.

About DC Motor interface: This trainer is intended to vary the Speed control of a DC motor using Fiber optic communications. The fiber optic link from any PWM transmitter fed as input to this speed control trainer. This trainer is same as DC motor speed control trainer PE-10, except that this has an additional facility to connect fiber optic interface also. Read explanations for PE-10.

This is a Microcontoller based speed control demonstrator. This unit consists of 3
blocks.
(a) Microcontroller based PWM Transmitter,
(b) Fiber optic receiver with PWM demodulator, and

(c) a motor tacho-generator drive assembly. This makes use of Pulse width modulation technique. The transmission of digital data from the Microcontoller is serialized and passes through Fiber Optical cable. The received signals are used to control the speed of DC Motor. This has two parts (a) a Microcontoller (b) the DC motor interface system. This DC drive has built in Tachogenerator, with Digital RPM indicator.

Specifications:
Transmitter : Fiber optic Infra Red 820 nm peak wavelength housed in
FC adapter.

Receiver : Photodiode with Peak sensitivity 880nm
Connection : Plastic fiber optic package, suitable for PMMA cable,
housed in FC Adapter
Fiber optic cable : 1000 mm multi-mode plastic 1-Meter fiber cable
Fiber connector : Industry standard FC – FC connector
Fiber optics cable type : Plastic optical cable, step index, multimode.
Core refractive index : 1.492
Clad refractive index : 1.406
Acceptance angle : Within 60 degrees
Core diameter : 1000mm
Fiber diameter : 2.2mm
Fiber length supplied : 1 meter and 3 meter
Microcontroller : PIC based
Duty cycle of PWM : Variable in the range of 10% to 90%
Pulse amplitude : TTL
Pre-settable : in the range of 0 to F hex
Speed increment : By single pulse increment or decrement
Motor : A permanent magnet DC motor
Speed : In the range of 30 to 530 RPM operating at 24 V DC
Feedback signal : Using Tacho-geneartor
Power supply : 5V and 12 V
Speed measurement : By using an external voltmeter. This is supplied along with the trainer