Posts Tagged ‘timer alarm’



Countdown timer with alarm

Saturday, October 23rd, 2010

This circuit is IC implementation schedule. No. 555 applied with IC number LM3905.(More circuits used LM3915) By the IC to the number 555 are the circuits Stable multi-vibrator. How often do produce it.This frequency is then forwarded to the scheduling with the integrated circuit number LM3905. When entering the power supply circuit IC1 No. 555. [...]

Minute Timer with alarm by IC555

Thursday, October 21st, 2010

This circuit uses a 555 IC timer number.This small, compact and portable. For the snooze alarm when some 10 or 15 minutes.It makes clear the brain is ready to continue to work. When the switch S1 to enter a power supply circuit, it will be ready to go.The circuit includes a circuit IC1 Mono Stable [...]

Simple scheduling tool

Tuesday, September 7th, 2010

IC 555 to IC Timer (scheduling IC) or IC timer.Which may be can be considered quite unique features.To use the time to bring the device resistance. For the period that desire. This circuit 555 to the IC number on the circuit Mono Stable. Multi Vibrator. or Delay circuit with operating environment that provides a second [...]