Tag Archives: LM339

Battery Discharge Cut-off Control

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This circuit prevents over-discharge of a lead-acid battery by opening a relay contact when the voltage drops to a predetermined voltage (lower voltage threshold). When the battery is recharged to a second predetermined higher voltage (upper voltage threshold), the relay contact automatically re-closes and power again flows to the load…. Read more »

DIY infrared remote extender circuits

      We use the DIY infrared remote extender circuits to control the satellite receiver from any room in the house.With a single receiver.Save money not having to buy additional equipment.       Now the satellite receiver are steadily increased popularity. If you are one of those. And you want to Watch the favorites… Read more »