~li~ Dog Repellent
The electronic dog repellent route blueprint is a high outlay ultrasonic receiver that is essentially expected to deed as a dog and cat repeller, that may be used people to deed as a halt against a few animals. It should NOT be relied on as a counterclaim against assertive dogs but it may help confuse them or urge on them to go divided and do not ponder this as an electronic harassment repeller.
Cell Phone detector
This useful mobile bug or unit phone detector, pocket-size mobile delivery detector or sniffer can clarity the participation of an activated mobile cellphone from a stretch of one and-a-half metres. So it may be used to stop use of mobile phones in hearing halls, trusted rooms, etc. It is moreover useful for detecting the use of mobile phone for espionage and without official authorization video transmission.
Smoke detector
This home fume detector route warns the user against glow accidents. It relies on the fume that is constructed in the eventuality of a glow and passes between a tuber and an LDR, the amount of light descending on the LDR decreases. This sort of route is called visual fume detector. Do not use it as a home fume detector it's jus for electronic projects.
Metal detector
The steel detector route shown here contingency act for the boundary of ease for a steel detector, nonetheless the design functions surprisingly well. It uses only one 40106 conjuration Schmitt inverter IC, a capacitor and a finding curl " and of march the batteries. A lead from IC1b pin 4 needs to be trustworthy to a intermediate call air wave aerial, or it should be wrapped around the radio. It may be used even similar to the palm hold steel detectors.
Solar horse
Here is a solar horse route to assign Lead Acid or Ni-Cd batteries using solar energy. The route harvests solar appetite to assign a 6 volt 4.5 Ah rechargeable battery for assorted applications. The horse has Voltage and Current law and Over voltage cut off facilities.
Sound switch
With this sound activated switch, manage by sound may be really useful, not only on a drudge but moreover for a bit of home automation, for e.g. a sound-activated light responding to a wallop on the doorway or a palm clap. The light will be automatically switched off after a few seconds. An substitute use is criminal insurance – if someone wants to open the doorway or break something the light will advance on, suggesting that someone's at home.
RFSim 99
FSim99 is a freeware software that can help you in RF simulation, in your projects, mainly if you are perplexing to design air wave filters. RFSim99 functions with S-parameters. This means that not only will it copy and break down into parts circuits built out of its inner library of components, but that it can accustom any route inhibit or theatre for that these are known.
Voltage Doubler
This dc voltage doubler route produces a voltage that is twice its voltage supply. This is useful when a aloft voltage turn is indispensable out of a singular descend voltage power supply. Since the stream expenditure levels are low in such cases, the route may be built with minimal resources.
Water turn indicator
Most water-level indicators for H2O armoured column are formed on the number of LEDs that glow to show the analogous turn of H2O in the container. Here you present a digital chronicle of the water-level indicator. It uses a 7-segment manifestation to show the H2O turn in numeric form from 0 to 9.
LED circuits
Some of the most appropriate LED electronic projects and circuits. Enjoy!
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