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Old 11th March 2012, 04:17 AM   #501
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Default apex 555 protection pcb size ?

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Originally Posted by apexaudio View Post
Simple Soft-start, DC, Thermal and Overload Protect with NE555. Use single 12vac for suply.
pcb size ?
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Old 11th March 2012, 07:28 AM   #502
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hi ravpeet the size is,
41mm - 61mm
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Old 11th March 2012, 08:43 AM   #503
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thanx nazirdigi
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Old 11th March 2012, 10:46 AM   #504
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Quote:
Originally Posted by nazirdigi View Post
hi apex sir,
now i put 10k ntc .
now the protect circuit is working, but when power on , the relay delay time is one second ,because the led indicator only blinking once and after relay connects the led permanently lights on, how can i increase the delay time to 3 or 5 seconds?
Replace cap 1uF with 10uF or 680k with 2,2M and delay time will increase.
Regards
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Old 11th March 2012, 10:50 AM   #505
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thanks apex sir for the reply
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Old 11th March 2012, 04:53 PM   #506
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Originally Posted by apexaudio View Post
Replace cap 1uF with 10uF or 680k with 2,2M and delay time will increase.
Regards
i changed the 1uf cap with 10uf , the delay time is 10seconds, and i change it to 2.2uf but delay time 2seconds, tommorow i'll buy 4.7uf and i'll check it.
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Old 12th March 2012, 08:16 AM   #507
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apex sir,
send me psu-10 pcb pdf file
thanks

regards
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Old 12th March 2012, 10:32 AM   #508
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hi apex sir,
today i change to 4.7uf cap, and its worked perfect, delay time is 5second,
thanks for the pcb.
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Old 12th March 2012, 02:51 PM   #509
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Quote:
Originally Posted by nazirdigi View Post
hi apex sir,
today i change to 4.7uf cap, and its worked perfect, delay time is 5second,
thanks for the pcb.
Delay time is 1second per 1uF
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Old 12th March 2012, 09:39 PM   #510
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...the led indicator blink 5 times (1Hz)?
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