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These are Carbon Film Resistor with a value of 68k ohm 1/4W and tolerance of ±5%
The serial interface allows for simple communication with a computer or laptop via a USB to Serial adapter or TTL converter
also known as RMCs
0uA @VDD=3V
ST 3845B High Performance Current Mode PWM Controller 6 Pin wire Male connector Socket Pin Electric Jointer These are Carbon Film ResistorSTMicroelectronics 3845B is a high Performance current mode PWM controller. The 3845B control IC family provides the features required to implement off line or DC to DC fixed frequency current mode control schemes with a low external part count. Internally implemented circuits include a trimmed oscillator with start up current less than 0. 5mA for precise DUTY CYCLE CONTROL under voltage lock out, a precision reference trimmed for accuracy at the
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