Comments on: 10 Minute timer circuit. http://www.circuitstoday.com/10-minute-timer-circuit An Authentic Resource on Electronics Wed, 08 Feb 2012 02:09:28 +0000 hourly 1 http://wordpress.org/?v= By: Seetharaman http://www.circuitstoday.com/10-minute-timer-circuit#comment-77065 Seetharaman Tue, 03 Jan 2012 00:19:22 +0000 http://www.circuitstoday.com/?p=431#comment-77065 Hi Srikanth calibrate the dial of potentiometer R5 practically and use it for setting. this ic has normally got a good reliability. Hi Srikanth calibrate the dial of potentiometer R5 practically and use it for setting. this ic has normally got a good reliability.

]]> By: Srikanth http://www.circuitstoday.com/10-minute-timer-circuit#comment-77001 Srikanth Mon, 02 Jan 2012 05:40:59 +0000 http://www.circuitstoday.com/?p=431#comment-77001 Thanks, its good circuit & very simple to design. If i set the timer to 5 minutes delay then a push button is pressed. can the timer intimate me after 5 minutes with Led D1 indication. Thanks, its good circuit & very simple to design.

If i set the timer to 5 minutes delay then a push button is pressed.
can the timer intimate me after 5 minutes with Led D1 indication.

]]> By: Seetharaman http://www.circuitstoday.com/10-minute-timer-circuit#comment-65577 Seetharaman Thu, 10 Nov 2011 17:57:53 +0000 http://www.circuitstoday.com/?p=431#comment-65577 Hi Brian S1 is a push to on and release to off switch (bell push) With the first negative pulse IC pin 3 will go low, hence LED D2 Red should come on after ten minutes D1 green should come on and Red should go off. Please check. Hi Brian S1 is a push to on and release to off switch (bell push) With the first negative pulse IC pin 3 will go low, hence LED D2 Red should come on after ten minutes D1 green should come on and Red should go off. Please check.

]]> By: Brian S http://www.circuitstoday.com/10-minute-timer-circuit#comment-65509 Brian S Thu, 10 Nov 2011 00:23:48 +0000 http://www.circuitstoday.com/?p=431#comment-65509 Nevermind - I forgot an important connection - I did not bring power to the 555 via pin 8. The red lights and the green LED goes out. I'm sure in ~10 minutes the green will light. Nevermind – I forgot an important connection – I did not bring power to the 555 via pin 8. The red lights and the green LED goes out. I’m sure in ~10 minutes the green will light.

]]> By: Brian S http://www.circuitstoday.com/10-minute-timer-circuit#comment-65507 Brian S Thu, 10 Nov 2011 00:18:00 +0000 http://www.circuitstoday.com/?p=431#comment-65507 Old post but, The schematic doesn't work ---- There is a direct connection from positive to ground with resistors and LEDs connected. The LEDs light without any IC involvement. I don't know how to correct for applicaton. Old post but, The schematic doesn’t work —- There is a direct connection from positive to ground with resistors and LEDs connected. The LEDs light without any IC involvement.

I don’t know how to correct for applicaton.

]]> By: seetharaman http://www.circuitstoday.com/10-minute-timer-circuit#comment-61835 seetharaman Sun, 14 Aug 2011 17:26:36 +0000 http://www.circuitstoday.com/?p=431#comment-61835 Hi Mayur7 as per manufacturers data the nomograph goes up to 100sec with 10M with 10uf or 1M with 100uF. Beyond this it cannot be predicted. but I have tried upto 470uF and 1M with a maximum of 7 to 8mts, not beyond this. I have used tantalum capacitor and metal film resistance. http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXvzqv.pdf Hi Mayur7 as per manufacturers data the nomograph goes up to
100sec with 10M with 10uf or 1M with 100uF. Beyond this it cannot be predicted. but I have tried upto 470uF and 1M with a maximum of 7 to 8mts, not beyond this. I have used tantalum capacitor and metal film resistance.

http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXvzqv.pdf

]]> By: Mayur7 http://www.circuitstoday.com/10-minute-timer-circuit#comment-61780 Mayur7 Sat, 13 Aug 2011 16:37:06 +0000 http://www.circuitstoday.com/?p=431#comment-61780 pls provide list of values of components for different time durations. i want to set the timer about 2-3 hours. pls provide list of values of components for different time durations. i want to set the timer about 2-3 hours.

]]> By: Mayur7 http://www.circuitstoday.com/10-minute-timer-circuit#comment-61779 Mayur7 Sat, 13 Aug 2011 16:32:51 +0000 http://www.circuitstoday.com/?p=431#comment-61779 hi, i want to set the time about 2-3 hours. which values should i select. and if possible, pls provide list of values of components for different time durations. hi, i want to set the time about 2-3 hours. which values should i select. and if possible, pls provide list of values of components for different time durations.

]]> By: seetharaman http://www.circuitstoday.com/10-minute-timer-circuit#comment-61217 seetharaman Wed, 03 Aug 2011 12:00:16 +0000 http://www.circuitstoday.com/?p=431#comment-61217 Hi Suzaku the output of the IC NE555 will be going between high and low hence the LEDs will alternate if their polarities are connected correctly. Hi Suzaku the output of the IC NE555 will be going between high and low hence the LEDs will alternate if their polarities are connected correctly.

]]> By: racso http://www.circuitstoday.com/10-minute-timer-circuit#comment-61170 racso Tue, 02 Aug 2011 18:43:40 +0000 http://www.circuitstoday.com/?p=431#comment-61170 hi mysty if you cant get turnit on the green led i suggest check the polarity anode cathode bye hi
mysty
if you cant get turnit on the green led i suggest check the polarity anode cathode

bye

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