Electronic Control

Here is a simple IR audio link that can be used to transmit audio signals up to 4 meters. The signal to be transmitted is applied to the base of Q1 via resistor R4.The transistor Q1 drives the IR transmitting diodes D1 and D2.The audio input will be modulated to the IR signals transmitted. The [...]

Here is a simple IR headphone circuit that is suitable for listening to TV or radio with out disturbing others.For beginners the IR headset is a better option than FM head sets because they often produce desirable sound quality with out tuning as well as difficult impedance matching that is often done in radio circuits [...]

Lost off tap, leaking washing machine water level dropped in the aquarium water in your basement etc. Such situations often cause problems and financial burden. Prevention is better than treatment equipment multifunctional. Easy to use in a variety of L Fluid level can be set to low, medium and high LED displays, liquid level control [...]