Sunday

Saturday

RF Signal Jammer Circuit

The post describes a simple homemade RF signal jammer circuit that can be used for jamming any RF signal within a radial range of 10 meters. The idea was requested by one of the interested readers of this blog.

Friday

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Wednesday

Monday

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Friday

Self Optimizing Solar Battery Charger Circuit with Buck Converter

The post discusses a simple IC 555 based self optimizing solar battery charger circuit with buck converter circuit that automatically sets and adjusts the charging voltage in response to the fading sunlight conditions, and tries to maintain an optimal charging power for the battery, regardless of the sun ray intensities.

Thursday

Heart Rate Monitor, Alarm Circuit

The post explores a simple circuit which may be used for monitoring the critical heart rate of a patient (senior citizen), the circuit also includes an alarm for indicating the situation.  The idea was requested by Mr. Raj Kumar Mukherji

Monday

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Monday

Thursday