PT4115 30V 1.2A Step-Down Converter (Pack of 1000) Push-To-Make Switch These are Carbon Film Resistor

These are Carbon Film Resistor with a value of 910k ohm 1/4W and tolerance of ±5%

To interface with TTL logic levels

and is also used in audio and switching circuits

At the logic level

PT4115 30V 1.2A Step-Down Converter (Pack of 1000) Push-To-Make Switch These are Carbon Film ResistorThe PT4115 is an inductive step down converter with continuous conduction mode that is designed to efficiently drive single or multiple series linked LEDs from a voltage source higher than the total LED chain voltage. The PT4115 can produce more than 30 watts of output power depending on the supply voltage and additional components. The PT4115 has a power switch as well as a high side output current detecting circuit that employs an external resistor