| Most bathtubs have an overflow pipe to prevent the bathtub from overflowing if you forget that you have opened the tap. However, disasters a...
All items tagged with Alarm and oscillator (9)
| Simply forgot to water it – and then you can wave goodbye to that expensive bonsai. A pity about all the work that went into it… But this dr...
| Sometimes the need arises for a simple, gated, pulsed alarm. The circuit shown here employs just four components and a piezo sounder and is...
| Having a recent arrival in the family meant that some form of baby alarm or monitor was required if 'junior' was not to 'wah' unduly in h...
| 055 HIGH-VOLUME ALARM When this alarm is actuated by a low-level signal at input W, the (FiF) loudspeaker produces a number of 4-tone sequen...
| The purpose of this one-chip circuit is to give an audible alarm in case a thief attempts to steal the car radio, which is generally conside...
| for home and garden A periodic alarm signal has many ap- plications in daily day life: "lights off" indicator in cars, water level in- dicat...
| hydro-alarm It is well known that plant growers with a large "collection" have to work very hard in order to prois- and causes pin 13 duce s...
| 7-28 elektor july/august 1980 37 1 universal warning alarm 3 ... 15 V 5 ... 20 mA v!rs. 0 61 ip Mc T R511 pH i1 used to pulse a second oscil...