Voltage dividers output a fraction of the voltage across them.
- 001 Resistive component multimeter voltage-current-resistance measurements
- 002 Diodes especially LED-rectifier forward-reverse bias
- 003 Diodes-Zener voltage regulator-full wave bridge rectifier-polarity indicator
- 005 RC time constant-Capacitor-Resistor
- 006 Capacitor current source voltage ramp – LM334
- 007 Parallel components – Resistors – Light emitting diodes LEDS – Capacitors
- 008 NPN Bipolar Junction Transistor BJT switch including capacitor timed fade off
- 009 PNP Bipolar Junction Transistor BJT switch including capacitor timed fade off
- 010 NOT gate signal inverter using switch – NPN BJT – 74HC14 IC
- 011 555 timer bistable mode flip flop with light dependent resistor LDR
- 012 555 timer monostable mode one shot
- Voltage dividers make a nice voltage signal but a very poor voltage source. Use an amplifier, such as a transistor, or better yet, an op amp, to boost the power provided by the voltage.
- 2 equal value fixed resistors connected in series across the power supply, will give you 1/2 of the supply voltage at the output. 3 equal value resistors will give you 1/3 of the supply at the output closer to ground, and 2/3 of the supply voltage at the output closer to the positive side of the supply.
- Trimpots and other potentiometers are made specifically to be adjustable voltage dividers. The output voltage will depend on where the wiper is turned to. Turning the wiper adds resistance to one side of the power supply while also reducing resistance to the other side of the power supply.
- Light dependent resistors LDRs have a variable resistance that depends on how much light is falling on them. They are commonly used to replace one fixed resistor in order to make a light dependent variable voltage divider. Keep in mind that really bright light will bring their resistance to almost zero ohms, so I recommend adding extra resistance in series with it as needed to prevent too much current flow.