someone pls save me before i go crazy...i need to design a 4-bit DAC similar to the 3-bit i uploaded but i need to know how the 3-bit performs before i can even attempt a 4bit.
can someone explain how fig 12.1 operates?
I am rebuilding the power supply in an arcade. I am replacing all of the components. If you look at the schematic, R5 is labeled as 25Ω, 5W. The actual resistor on the board was a 13Ω, 5W. The resistor is going to the input of a 7905 -5V regulator.
Hi, I am a new member here. I have come across a problem regarding a logic with a resistor connected to the ground, and one without this resistor and ground. It operates normally with this resistor connected to ground. However the one without has problem operating normally. Attached is the circuit diagram with the 100ohm resistor. May I ask why it is needed there so that it operates normally?
Why is the resistor placed one on top of other...instead of using a separate voltage divider from the battery to compare the voltage....this resistor one on top of other just makes it look more complex and complex for calculation too....
Is there a special reason....a hidden trick in this circuit....I don't see the meaning of just complicating(besides saving...3 resistors)....
I have the attached circuit for an LED to turn on when a voltage reaches a certain limit. I want it to turn on at 5.6V (keeping in mind the 0.6V for the transistor).. so would I use a 5V Zener diode and a 150 Ohm resistor for the LED (5V/150Ω = 33mA; LED needs 30mA) ?