Circuit Lake

Electronic Project and Circuit Collection

Power Supply

Adjustable Dummy Load, RE:LOAD

April 03, 2013 By: admin Category: Analog, Power Supply No Comments →

Re:load is low cost adjustable constant-current load with self-powered (passive). The circuit is simple and easy to build. It uses BTS117 FET as main pass element. The FET has built in ESD, overcurrent, overvoltage, and over temperature protection, making them ideally suited for a dummy load. MCP6002 op-amp is used in this project because it […]

Lead-Acid Battery Tester, Desulfator & Charger

April 01, 2013 By: admin Category: AVR, Power Supply, Tools No Comments →

Da Pimp is ATmega48-based portable Lead-acid battery tester, desulfator & charger designed by Mikey Sklar. It uses capacitors instead of a transformer for efficient conversion of AC to DC voltages. With input 120VAC, it will deliver 0.5A constant current output and dynamic voltage 1VDC – 100VDC. While 220VAC input will increase its current output to […]

Lead-Acid Battery Solar Charger

March 19, 2013 By: admin Category: Analog, Power Supply No Comments →

The purpose of the project is to build lead-acid batteries charger using solar panel in small and portable applications. The charger will stop charging once a pre-set voltage (temperature compensated) has been reached, and resume charging when the voltage has dropped off sufficiently. The load is disconnected when the battery voltage drops below 11V and […]

Low Dropout Adjustable Power Supply

October 19, 2012 By: admin Category: Analog, Power Supply No Comments →

This adjustable breadboard power supply is built based on IC MIC2941. It has very low dropout only 40mV – 400mV compared to 1.25V – 2.0V for LM317, which means your output voltage can be much closer to the input voltage. The power supply can deliver guaranteed 1.25A output.