Recent Posts
Free Electronic Circuit | Cool Circuit Collections
Return To Blog Listing
High Quality Electronic Circuits for Hobbies.
electronic circuit, circuit electronic, circuit boards, circuit, printed circuit boards
Recent Posts Tagged With 'alarm-detector-sensor'
Oxygen Sensor Simulator
This electronic circuit is an oxygen sensor simulator that built on a protoboard. Note the cigarette lighter plug used for power source. The adjustment knob is at the left, and the switch is on the right. The red indicator LED is in the middle. Only ...
Fan Controller with an LM76 as Temperature Estimator
This temperature sensor circuit is to control a small fan controller. An LM76 as temperature 'estimator' used in this project. To make it a little more interesting, an LPH7653 display to show the heat sink temperature and fan status. This projects u...
Battery Low Voltage Beeper
This electronic circuit is an alarm circuit for low battery condition. It provides an audible and visual low voltage warning for 12V battery powered devices. When the battery voltage is above the set point (typically 11V), the circuit is idle. If the...
Car Anti-Theft Wireless Alarm
This alarm circuit is an anti- theft wireless alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF FM radio-controlled, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park....
Car Anti-Theft Wireless Alarm
This alarm circuit is an anti- theft wireless alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF FM radio-controlled, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park....
Battery Low Voltage Beeper
This electronic circuit is an alarm circuit for low battery condition. It provides an audible and visual low voltage warning for 12V battery powered devices. When the battery voltage is above the set point (typically 11V), the circuit is idle. If the...
