Circuit Lake

Electronic Project and Circuit Collection

Analog


Low Cost Hearing Aid, TDA2822M

May 28, 2013 By: admin Category: Analog, Audio, Miscellaneous No Comments →

DIY Electronics hearing Aid

This Low Cost Hearing Aid project is built based on TDA2822M IC. This general-purpose electronic hearing aid needs 3V DC (2×1.5V battery) to works. Use an 8-pin DIP IC socket for TDA2822M for easy assembling and maintenance. Simple & Low cost hearing Aid Schematic

Adjustable Dummy Load, RE:LOAD

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

Dummy Load Tester 30V - 3A

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 […]


Simple Youtube Karaoke Mixer

March 21, 2013 By: admin Category: Analog, Audio, Miscellaneous No Comments →

very simple audio mixer

Paulorenato has built a very simple audio mixer for his YouTube karaoke system. The mixer simply takes the output of the TV that streaming YouTube video plus the Karaoke microphone output and combines them before sending the signal to the amplifier (aka “Receiver”) input.

Lead-Acid Battery Solar Charger

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

lead acid solar charger

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 […]