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Miscellaneous circuit diagrams

Miscellaneous electronics circuits

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]


TV remote control Blocker


Just point this small device at the TV and the remote gets jammed.
[View TV remote control Blocker 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]


..:: Important ::..

Read disclamer, please!

..:: Diagrams ::..

Audio
Controllers and timers
For your car
Light and LED
Miscellaneous
PC related
Power supplies
Radio
Telephone related
Tools and measuring

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