Replacing the GoldScan selector with an Electronic Selector and Digital Indicator

[Rafael]

Greetings, I am thinking of replacing the 4-pole triple selector (SW1) with an electronic selector. Would it be convenient to use bilateral switches like the CD4066 or should I use mini relays?

[Rafael]

On the other hand, and due to the difficulty of obtaining analog indicators in my country, I would like to replace it in my project with a digital indicator, perhaps with a small OLED screen that shows a moving needle. Would this modification add strange high frequency noise to the detector? I read suggestions and will take them into account. Thank you.

[hunter63]

Hello
If you are an enthusiast, you are asking about Goldscan4, you want to use analog switches, I suggest using CD4051, as for the display, you must realize that Goldscan already consumes about 1.65 A. I have constructed Goldscan 6, the range is satisfactory, but the discrimination is a lot to wish for.
Regards

[Carl-NC]

Greetings, I am thinking of replacing the 4-pole triple selector (SW1) with an electronic selector. Would it be convenient to use bilateral switches like the CD4066 or should I use mini relays?

Bilateral switches should work, just be careful that the switch resistance does not affect the circuit.

On the other hand, and due to the difficulty of obtaining analog indicators in my country, I would like to replace it in my project with a digital indicator, perhaps with a small OLED screen that shows a moving needle. Would this modification add strange high frequency noise to the detector? I read suggestions and will take them into account. Thank you.

You would need a micro to drive this and the micro will have clock noise. However, with careful placement it should not affect performance.

[Rafael]

Following your recommendations, I will design the electronic selector and the screen and will publish it in this forum to make corrections or improvements. I will take into account any suggestion. Thank you.