is it okay to use an X1/X2 film cap in this circuit...

jarthel · 6th July 2007, 12:28 PM

http://mitglied.lycos.de/Promitheus/delay.jpg

I'm looking to use the film cap in place of the .33uF 250V cap.

thank you for the reply

smithy666 · 6th July 2007, 12:44 PM

You should use an X1 or X2 rated cap for this circuit. BTW, this is from Elektor. I have used this successfully for years in an amp. If you are interested I have a PCB for this which also incorporates a remote power on circuit (you can use any switch to power on). Let me know if you want more info.

jarthel · 6th July 2007, 12:53 PM

Quote:

Originally posted by smithy666
You should use an X1 or X2 rated cap for this circuit. BTW, this is from Elektor. I have used this successfully for years in an amp. If you are interested I have a PCB for this which also incorporates a remote power on circuit (you can use any switch to power on). Let me know if you want more info.

quite interested. send me a mail.

Thank you

smithy666 · 6th July 2007, 01:03 PM

drop me an e-mail @ atomicnirvana@gmail.com and I'll send you schematic + pcb layout

jarthel · 6th July 2007, 01:03 PM

is the cap value across the 2x 470Kohm important?

thanks again

smithy666 · 6th July 2007, 01:12 PM

Yes, crucial. Its impedance is about 10k at 50Hz, which drops most of the mains voltage, effectively reducing it to around 24V (less the diode drop and small drop from the series resistor) to drive the relay coil.

jarthel · 6th July 2007, 01:12 PM

Quote:

Originally posted by smithy666

email sent.

thank you.

jarthel · 6th July 2007, 01:16 PM

Quote:

Originally posted by smithy666
Yes, crucial. Its impedance is about 10k at 50Hz, which drops most of the mains voltage, effectively reducing it to around 24V (less the diode drop and small drop from the series resistor) to drive the relay coil.

so in the elektor circuit, a 24V relay is used?

thanks again

smithy666 · 6th July 2007, 01:19 PM

Yes, it is a 24V relay. I've sent through the files to you

jarthel · 6th July 2007, 01:23 PM

Quote:

Originally posted by smithy666
Yes, it is a 24V relay. I've sent through the files to you

can you tell me (or point me to guide) on how to calculate the resulting voltage by changing the value of the 330nF cap?

6th July 2007, 12:28 PM	#1
jarthel diyAudio Member Join Date: Jan 2002 Location: somewhere in Australia	is it okay to use an X1/X2 film cap in this circuit... http://mitglied.lycos.de/Promitheus/delay.jpg I'm looking to use the film cap in place of the .33uF 250V cap. thank you for the reply

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6th July 2007, 12:44 PM	#2
smithy666 diyAudio Member Join Date: Mar 2001 Location: Sydney	You should use an X1 or X2 rated cap for this circuit. BTW, this is from Elektor. I have used this successfully for years in an amp. If you are interested I have a PCB for this which also incorporates a remote power on circuit (you can use any switch to power on). Let me know if you want more info.

6th July 2007, 01:03 PM	#4
smithy666 diyAudio Member Join Date: Mar 2001 Location: Sydney	drop me an e-mail @ atomicnirvana@gmail.com and I'll send you schematic + pcb layout

6th July 2007, 01:12 PM	#6
smithy666 diyAudio Member Join Date: Mar 2001 Location: Sydney	Yes, crucial. Its impedance is about 10k at 50Hz, which drops most of the mains voltage, effectively reducing it to around 24V (less the diode drop and small drop from the series resistor) to drive the relay coil.

6th July 2007, 01:19 PM	#9
smithy666 diyAudio Member Join Date: Mar 2001 Location: Sydney	Yes, it is a 24V relay. I've sent through the files to you

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