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Circuit Innovations

24 Leasmires Avenue


York.  YO61 3DU   UK

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Kits and Products > LM317T Variable Voltage Regulator Kit


LM317T Voltage Regulator Kit


A variable voltage regulator circuit providing a fully regulated output between 1.25 and 30v at currents up to 1A.

An ideal educational project for beginners.


Click Here for the circuit theory of the LM317



  Adjustable output voltage from 1.25 to 30v Maximum output current 1A
  Fuse protected AC or DC input voltages
  PCB Dimensions : 58 x 58mm. Available as a kit or ready-built
  Supplied with full assembly instructions and circuit description


Transformer Selection

A mains transformer is not supplied with this kit. The choice of transformer depends upon the voltage range that the regulator will be used at. It is recommended that the transformer voltage is slightly higher than the maximum output voltage required from the regulator. For example, if the kit is to be used to give an output voltage of 5-10v, it would be advisable to use a 12v transformer. Higher voltages could be used but this would lead to higher power dissipation in the regulator which would require an additional heatsink.


Price / Ordering Information Order Code Price  Cart
  LM317 Variable Voltage Regulator (Assembled) LM317A £23.95 
 LM317 Variable Voltage Regulator (Kit) LM317K £16.95 
 All prices include UK postage and packing. Please contact us for overseas shipping prices

 We can also make custom designs based on any of our products. Please contact us with your requirements.