Beeper or flashing LED alert
1.5V battery powered portable unit
The circuit will be issued by the intermittent beep (or flash light-emitting diodes), contained in the water has reached the recipient to the desired level. It should be installed on top of the recipient (for example, a plastic fuel tank) with two alligator clips, also acting as [...]
Alternative version of the popular circuit
3V battery supply - Still operating at 1.3V
This is due to the use of CMOS integrated circuits 4060. In some cases, some of the equipment made by the manufacturer (rather than the Motorola) does not run, even in the name of 3V supply voltage.
A simple treatment, can be an [...]
This is circuit Single LED GATE Flasher by 4011
Flash = 1Hz , IC 4011 ’s Input pin 1 for Control LED ON or Flasher.
Logic = Low (LED ON) , Logic Hi = LED Flasher.
I like this circuit because it is easy to make.
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