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L7805 Voltage Regulator for Arduino 5v

L7805 Voltage Regulator for Arduino 5v

Very Basic 5v power supply for you Arduino ect costs only about $2

Simple NO PROTECTION 5volt 1000mA powersupply good for stand alone arduino.

Items Needed
1x L7805 voltage regulator

2x 10uF 35v Capacitor (or 1x 10uf on output and 1x 100uf on input)

Input voltage should be 8v -36v. 200mA without heatsink easily.
If you plan on drawing 1 Amp add a heatsink.

Note – you can also add an 1N4007 diode to the input for a tiny bit of protection.

2 Comments

  1. Mehmet · August 25, 2012 Reply

    IT’s one of the most famous reogaltur IC to make the ripple in wave form smooth.when u convert AC to DC u need to use like this IC to regulate the voltage and current.78 mean that it works with + polarity and 05 means it produce +5 volts for u regulated and without ripple.if u want to have the higher voltage u should use 7805,7806.7812,78XX and for the negative polarity use 7905,7912, 79XX is positive type

    • Jeff · April 21, 2013 Reply

      While the LM7805 is widely available I like using the L4940V5 Low Dropout type regulator. It has a low forward voltage drop as compared to the LM7805 and is rated at 1.5 amps.

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