Larry Load.zip

author: thespeakerguy
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2 layer board of 0.61 x 0.61 inches (15.5 x 15.5 mm)
Uploaded: July 24, 2017
Shared: July 24, 2017
Total Price: $1.85

See article describing circuit. http://www.electronicdesign.com/displays/resistive-dummy-load-draws-constant-current-12-50-v

All component values and reference designators changed from article though. All load resistors are off PCB too. Use 1% through hole resistors mounted to output banana jacks. U1 is REF3012, U2 is OPA313, and U3, optional, is TPS3702AX18DDCT for checking battery voltage. This version will work off 2 x AAA batteries.

http://www.digikey.com/short/3v9d8r

See article describing circuit. http://www.electronicdesign.com/displays/resistive-dummy-load-draws-constant-current-12-50-v

All component values and reference designators changed from article though. All load resistors are off PCB too. Use 1% through hole resistors mounted to output banana jacks. U1 is REF3012, U2 is OPA313, and U3, optional, is TPS3702AX18DDCT for checking battery voltage. This version will work off 2 x AAA batteries.

http://www.digikey.com/short/3v9d8r

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