This popular power supply uses an L7812 voltage regulator IC together with bridge rectifier section and smoothing capacitors to provide a stabilised and regulated 12Vdc output of up to 500mA. Power-On LED indicator.
Ideal for powering many of the electronic kits that we sell or any other application where you need a stabilised 12Vdc supply.
As supplied without heatsink it is quite safe to draw 500mA continuously. This is a very conservative current rating as the circuit is capable of delivering 1 to 1.5A if the regulator IC is fitted with a suitable heatsink (e.g. Order Code HS-TO220 for loads of up to 1 Amp) and properly cooled. You would also need to uprate the input transformer accordingly.
Board requires a 12Vac, 0.5A minimum transformer for standard operation (not included).Features
Product selection advice: Please ensure the equipment under power draws less current than the power supplies maximum rated current detailed below (do not rely on equipment rating specifications as they are often incorrect). We recommend that the power supply is rated at least 20% above the equipment to be powered so it can handle current surges, etc.Specifications
|12Vac, 0.5A transformer (not supplied)
|Maximum input voltage
|24Vac / 35Vdc (see L78xx datasheet for detailed info)
|12V dc fixed
|0.5 Amps as supplied
|35 x 75 x 25mm
|Solder pads or posts @ 5.08mm centres
|SELF-ASSEMBLY Electronic Kit (KT) or
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info