Hello, I wanted to do this simple layout from the link below my problem is that I do not have a diac and the nearest store is 19 km away and my question is whether you can replace this diac with something else, e.g. properly connected transistors. Thanks in advance for reply. :D

No. Look further in that topic for a meaningful substitute diagram in # 14.

The easiest way is: This was once done in the Polam dimmers. The bases are to be unconnected.

thanks Added after 46 [minutes]: and you could give a diagram because it doesn't really want to work

At 230V? No, moreover, no deacon at 230V will not work. Most diacs have an operating voltage of 30 to 35V. The diagram is in post # 3.

Diagram from post # 3: is wrong. Compare with the diagram from where: This is what the replacement system should look like. At the same time, it will not be a replacement diac system for 30V. Only a deacon for about 2 ... 3V. To increase the ignition voltage, you need to significantly increase the value of resistor R1. And such a miracle works only with one polarization. In order for it to work for 2, it must be enclosed with a Graetz bridge as it is in the further diagrams from that topic.

I suggest you go to a place with electronic waste. Each compact fluorescent lamp has a DB3 or DB4 diac. Choose bulbs that are not overheated but have black (dark) electrodes. Electronics should be functional in them. Good luck

Diac Replacement Options: Alternatives to Diacs in Circuit Layouts (Link Included)

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#1 16337635 11 Mar 2017 11:54

Marcin7254 Marcin7254

Level 13

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Post #1
16337635 11 Mar 2017 11:54

Hello, I wanted to do this simple layout from the link below
http://katalogi.pl/uploads/old/6/images2005/20050730131631.gif
my problem is that I do not have a diac and the nearest store is 19 km away and my question is whether you can replace this diac with something else, e.g. properly connected transistors. Thanks in advance for reply.

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#2 16337650 11 Mar 2017 12:03

technikabasenowa technikabasenowa

Level 33

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Post #2
16337650 11 Mar 2017 12:03

https://www.elektroda.pl/rtvforum/topic2656228.html
#3 16337661 11 Mar 2017 12:09

Marcin7254 Marcin7254

Level 13

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Post #3
16337661 11 Mar 2017 12:09

https://static.elektroda.pl/attach/zast_diak_461.jpg will it work on 230V?
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#4 16338087 11 Mar 2017 15:22

_jta_ _jta_

Electronics specialist

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Post #4
16338087 11 Mar 2017 15:22

No. Look further in that topic for a meaningful substitute diagram in # 14.
#5 16338994 11 Mar 2017 21:18

zetdeel zetdeel

Level 39

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Post #5
16338994 11 Mar 2017 21:18

The easiest way is:

This was once done in the "Polam" dimmers. The bases are to be unconnected.
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#6 16340628 12 Mar 2017 17:27

Marcin7254 Marcin7254

Level 13

» | Topic author Helpful post? (0)

Post #6
16340628 12 Mar 2017 17:27

thanks

Added after 46 [minutes]:

and you could give a diagram because it doesn't really want to work
#7 16341956 12 Mar 2017 23:48

zetdeel zetdeel

Level 39

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Post #7
16341956 12 Mar 2017 23:48

Look at this:
#8 16342192 13 Mar 2017 08:54

jdubowski jdubowski

Tube devices specialist

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Post #8
16342192 13 Mar 2017 08:54

Marcin7254 wrote:
https://static.elektroda.pl/attach/zast_diak_461.jpg will it work on 230V?

At 230V? No, moreover, no deacon at 230V will not work. Most diacs have an operating voltage of 30 to 35V.

Marcin7254 wrote:
and you could give a diagram because it doesn't really want to work.

The diagram is in post # 3.
#9 16342263 13 Mar 2017 09:35

Anonymous Anonymous

Level 1

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Post #9
16342263 13 Mar 2017 09:35

Diagram from post # 3:
https://static.elektroda.pl/attach/zast_diak_461.jpg
is wrong.
Compare with the diagram from where:
https://www.elektroda.pl/rtvforum/topic2656228.html#12789507
This is what the replacement system should look like.
At the same time, it will not be a replacement diac system for 30V. Only a deacon for about 2 ... 3V.
To increase the ignition voltage, you need to significantly increase the value of resistor R1.
And such a miracle works only with one polarization. In order for it to work for 2, it must be enclosed with a Graetz bridge as it is in the further diagrams from that topic.
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#10 16342833 13 Mar 2017 14:00

bootrecord bootrecord

Level 14

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Post #10
16342833 13 Mar 2017 14:00

I suggest you go to a place with electronic waste. Each compact fluorescent lamp has a DB3 or DB4 diac.
Choose bulbs that are not overheated but have black (dark) electrodes. Electronics should be functional in them.
Good luck
#11 16343341 13 Mar 2017 18:45

Marcin7254 Marcin7254

Level 13

» | Topic author Helpful post? (+2)

Post #11
16343341 13 Mar 2017 18:45

I will search soon
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Topic summary

The discussion revolves around finding alternatives to diacs for a circuit layout due to the unavailability of the component. Users suggest various substitutes, including using transistors and components from electronic waste, such as diacs from compact fluorescent lamps (DB3 or DB4). Several diagrams are referenced to illustrate potential replacement configurations, with emphasis on the limitations of diacs at higher voltages (230V) and the need for specific resistor values to achieve desired ignition voltages. The conversation highlights the importance of proper circuit design and component selection for effective functionality.
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Diac Replacement Options: Alternatives to Diacs in Circuit Layouts (Link Included)

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