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.
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.
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.
7 Segment LED Counter
This simple counter can be used to count pulses
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.
This device beeps intermittently for approx. two seconds when a person in a range of about 10 meters emits a whistle.
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.
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.
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".
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.
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!
22kHz oscillator which produces sound that should repel insect. It has adjustable frequency. Its built around one CMOS 4047 circuit.
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.
High Quality Intercom
A very high quality intercom, which may also be used for room monitoring
Sound Effects Generator
This circuit uses a UM3561 IC to produce four different sound effects
High Voltage Stun Gun
High Voltage Stun Gun. It's not a toy!
Doorbell for the Deaf
This circuit provides a delayed visual indication when a door bell switch is pressed. Very helpful for deaf people.
Beeps when hears your whistle.
A gadget suitable for key-holders, games etc.