Battery Backup for SRAM or Microcontroller
This circuit can be used as a low cost SRAM and Microcontroller or Microprocessor Battery Backup. All the diodes are 1N4148, The diodes prevent battery […]
Battery-Circuits
Battery Backup Supply
This is a 9V power supply which will work even on power failure. It uses a rechargeable battery and regulators. A transformer with 15-0-15 AC […]
Battery Level LED Indicator
This LED Indicator uses a LM339, a quad comparator. LM339 can work on single or dual supplies, it has a open collector output that can […]
+5 to -5 using a 555 Astable Multivibrator
This is a very simple -5V supply using one 555, useful for analog blocks using FET Opamps using low power. This circuit came up when […]
Li-Ion Battery Charger
This circuit is built around LM3647 an Universal Battery Charger, This Circuit is an untested design. It is based on application hints and was provided […]
Digital 5V Power Supply using L296
This circuit is derived from an application note of L296, It is a Power Switching Regulator from ST. The advantage of using a switching regulator […]