LM35 and TL431 Automatic Temperature Control

This is an electronic circuit that can be used as automatic temperature control application. The circuit switches a miniature relay ON or OFF according to the temperature detected by the one-chip temperature sensor LM35. When the LM35 detects a temperature higher than the preset level (set by VR1), the relay is actuated. When the temperature falls below the preset temperature, relay is de-energized. The circuit can be powered by any AC or DC 12V supply or battery (100mA min.)

Download : schematic, layout and PCB (pdf)
related search : Electronic circuit project, automatic application, temperauter controller, LM 35 (src)

Computer Controlled Battery Manager

BattMan II is a computer controlled battery manager, intended for typical rechargeable batteries used by R/C and electronics hobbyists, as well as various consumer product batteries.

BattMan II has the following capabilities:

• Works with Nickel-Cadmium (NiCd), Nickel-Metal-Hydride (NiMH), Lithium-Ion (Li-Ion), Lithium-Polymer (LiPo), Lithium-Nano-Phosphate (LiNP), and Lead-Acid (Pb-Acid) batteries of 1.2 to 14.7 Volts.†
• Discharges batteries to measure capacity at rates of 130mA to 2A.
• Charges at rates of 130mA to 1.3A.†
• Automatically performs repeated discharge/charge cycles to break in new batteries, or erase NiCd voltage depression in old ones.
• Measures internal resistance.
• Monitors self-discharge.
• Real time graphical display lets you see problems like mismatched cells.
• Keeps a log of all operations performed, which can be imported into any spreadsheet program.
• Saves graphs of charge, discharge, auto-cycle, and monitor operations.
• Connects via parallel port to any PC running Microsoft Windows (95, 98, ME, 2000, XP, or Vista).
• Operating software, complete with source code, is available to download.

Download schematic and software
releated search: Electronic Circuit Project, Battery manager (src)