Variable Dual Lab Power Supply by LM317,LM337

The easiest way to avoid this is to have a power supply that allows you to adjust the voltage, so you can see that everything works as it should before the main supply is connected. The lab supply shown will current limit at around 800mA (this varies a bit because of the regulators), and can supply from +/-1.2V up to about +/-25V.

Using a dual-gang pot allows both supplies to be set simultaneously to the same voltage, and you can add metering for voltage and current if you want to. These will add substantially to the cost, but can be very useful.

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This entry was posted on Sunday, September 23rd, 2007 at 12:19 am and is filed under LM317, Power supply, Variable Regulator. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.