Circuit Lake

Electronic Project and Circuit Collection

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Low Cost Universal Battery Charger

October 20, 2011 By: admin Category: Analog, Miscellaneous, Project No Comments →

This circuit allows you to transform a mains adapter in to a charger for NiCd – NiMH batteries. With selectable charge current (50mA-400mA), the charger can be used to charge cellular phone, toys, portables gadget, video batteries, MP3 players etc. Supply voltage input starting from 6.5VDC to 21VDC (depending on used battery). The circuit features […]

Gas Leakage Alarm

October 15, 2011 By: admin Category: Alarm, Detector, Sensor No Comments →

Here is a circuit that can be used to detects the leakage of LPG gas and alerts the user through audio-visual indications. The circuit uses SEN-1327 gas sensor module from RhydoLABZ. Its output goes high when the gas level reaches or exceeds certain point. A preset in the module is used to set the threshold. […]

IR Remote Switch for Home Appliance

October 13, 2011 By: admin Category: Basic, Control, Remote No Comments →

If you are looking for simple ON-OFF remote switch for your home appliance then this InfraRed remote control circuit is suit for it. This circuit allows you to turn on/off your home appliance (lamp, ran, radio, etc) using any type TV, VCD or DVD remote control with range up to 10 meters. The circuit is […]

Capacitor ESR Tester

March 07, 2011 By: admin Category: Analog, Measurement, Project, Tools No Comments →

ESR (equivalent series resistance) is one of the characteristics that define the performance of an electrolytic capacitor. Low ESR is highly desirable in a capacitor as any ripple current through the capacitor causes the capacitor to heat up due to the resistive loses. Typical capacitor checker measures the capacity of the test capacitor. Some advanced […]