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Miscellaneous circuit diagrams

Miscellaneous electronics circuits

Sleeping-Aid


Many people experienced sleeping well in natural surroundings, into a tent or a wooden hut. This fact is due not only to the healthy atmosphere but also from our unconscious ability to perceive natural Earths magnetic-fields.
[View Sleeping-Aid circuit diagram]


Muscular Bio-Stimulator


This is a small, portable set, designed for those aiming at look improvement. The Bio-Stimulator provides muscles' stimulation and invigoration but, mainly, it's an aid in removing cellulitis.
[View Muscular Bio-Stimulator circuit diagram]


Voltage follower with 1G ohm input resistance


This circuit uses an LM11 to form a voltage follower with 1G ohm input resistance built using standard resistor values.
[View Voltage follower with 1G ohm input resistance circuit diagram]


7 Segment LED Counter


This simple counter can be used to count pulses
[View 7 Segment LED Counter circuit diagram]


Nocturnal Animals Whisker


This circuit proved very useful in keeping away from a terrace or a porch some bats and other nocturnal animals. You can use it for similar or different purposes.
[View Nocturnal Animals Whisker circuit diagram]


Whistle Responder


This device beeps intermittently for approx. two seconds when a person in a range of about 10 meters emits a whistle.
[View Whistle Responder circuit diagram]


Keys Finder


Imagine that is morning , you barely anticipate the bus for work and you can't find your keys. If you suffer from this situation frequently, this circuit is ideal for you. A fizzle is the only thing you have to do. The overall circuit is small enough to attach it to your keys.
[View Keys Finder circuit diagram]


IR Remote Control Jammer


Don't like your little brother's TV channel selection? Hate the volume your wife sets the stereo at? Want to just annoy someone? This circuit does all that and more by jamming most IR remote signals. The circuit releases a flood of pulsing IR light that confuses the reciever by corrupting the data stream.
[View IR Remote Control Jammer circuit diagram]


Ultrasonic Dog Whistle


One more circuit with famous NE555 timer circuit. This one produces ultrasound which can be heard by many animals. It's built to be "loud".
[View Ultrasonic Dog Whistle circuit diagram]


Magnetic Gun


This little gun can propel a small slug about 1.5 meters high, or 2.5 meters horizontally. It produces magnetic field using four coils and 4017b and NE555 which drive coils.
[View Magnetic Gun circuit diagram]


Magic Wand Conjuring Trick


This is circuit diagram of an interesting toy. It lights up if You move "magic wand" over it in the precisely right way that only you know!
[View Magic Wand Conjuring Trick circuit diagram]


Insect Repellant


22kHz oscillator which produces sound that should repel insect. It has adjustable frequency. Its built around one CMOS 4047 circuit.
[View Insect Repellant circuit diagram]


Muscular Bio-Stimulator


This is a small, portable set, designed for those aiming at look improvement. The Bio-Stimulator provides muscles' stimulation and invigoration but, mainly, it's an aid in removing cellulites.
[View Muscular Bio-Stimulator circuit diagram]


High Quality Intercom


A very high quality intercom, which may also be used for room monitoring
[View High Quality Intercom circuit diagram]


Sound Effects Generator


This circuit uses a UM3561 IC to produce four different sound effects
[View Sound Effects Generator circuit diagram]


High Voltage Stun Gun


High Voltage Stun Gun. It's not a toy!
[View High Voltage Stun Gun circuit diagram]


Doorbell for the Deaf


This circuit provides a delayed visual indication when a door bell switch is pressed. Very helpful for deaf people.
[View Doorbell for the Deaf circuit diagram]


Whistle Responder


Beeps when hears your whistle. A gadget suitable for key-holders, games etc.
[View Whistle Responder circuit diagram]


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