The input to the cdi unit is derived from two sources of the alternator.
Capacitor discharge unit circuit.
Essentially a small circuit that holds a charge while the load is not being driven and then releases the charge in a quick blast when the turnout is.
The effect of a capacitor is known as capacitance while some capacitance exists between any two electrical conductors in proximity in a circuit a capacitor is a component designed to add capacitance to a circuit the capacitor was originally known as a condenser.
Should a solenoid be left in circuit by the switch being held for a long period the current flowing through the coil after the initial surge will be less than 0 05a so it will not damage to the coil.
Referring to the above capacitor discharge ignition circuit diagram we see a simple configuration consisting of a few diodes resistors a scr and a single high voltage capacitor.
Designed to work with point motors from all manufacturers.
With dc only one loco can be operated at the same time unless the circuit is divided into isolated blocks as the current in the track controls the loco.
The solution to these problems is a capacitor discharge unit.
The all new mk3 version.
Capacitors are found in a number of electrical appliances and pieces of electronic equipment.
It shows when the discharge unit is powered and ready for use.
This alone serves as two functions.
Model railway electronics capacitor discharge unit the two systems commonly in use to control a model railway are analogue dc and digital dcc.
The capacitor discharge unit is intended to be used in conjunction with the accessory decoders but can be used anywhere that you have solenoid point motors to provide a high current pulse from a low current power supply.
This current burst is over by the time the switch contacts open.
Our capacitor discharge unit overcomes all these problems.
A capacitor is a device that stores electrical energy in an electric field it is a passive electronic component with two terminals.
Should a solenoid be left in circuit the current flowing through it after the initial.
Thus eliminating back emf across the switch contacts.
The mk3 has the added function of the led power indicator.
They store excess electrical energy during power surges and discharge it during power lulls to provide the appliance with a constant even supply of electricity.
The surge of current can cause other electronics to momentarily loose power and in some cases trigger a false short circuit detector.
Cdi circuit using an scr a few resistors and diodes.
Capacitor discharge unit cdu1c cdu2c cdu4c capacitor discharge units of various capacities for all sizes of layout.
Capacitor discharge ignition cdi or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors motorcycles lawn mowers chainsaws small engines turbine powered aircraft and some cars it was originally developed to overcome the long charging times associated with high inductance coils used in inductive discharge ignition idi systems.
