Voltage Dividers

A voltage divider is a simple circuit which turns a large voltage into a smaller one. Using just two series resistors and an input voltage, we can create an output voltage that is a fraction of the input. 

Voltage dividers are one of the most fundamental circuits in electronics. If learning Ohm's law was like being introduced to the ABC's, learning about voltage dividers would be like learning how to spell cat. [1]

Circuit diagram

The formula for a voltage divider is

$$Vout_1 ={ R1\over{R1+R2} } \times Vsup $$

and

$$Vout_2 ={ R2\over{R1+R2} } \times Vsup $$

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At the next STEM group meeting, I plan to have some of my boards available. These can be connected together with either dupont cables or with crocodile clip cables. Then voltages can be measured with a multimeter.

boards

Links

  1. Sparkfun voltage dividers

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