Metal detector

463

05:27:32

I need help with this pi metal detector. It is Russian pi metal detector and I need a working circuit to make some tests. It does not work so I need help. Schematic is on internet so please take a look.

published 8 years ago

rich11292000

8 years ago

You need to atleast ground the 555.

hurz

8 years ago

Dont tell us "schematic is on the internet" were the hell is your link to this circuit!

krang

8 years ago

Sorry for link. It is very easy to find schematic and I dont know can I post link here. So, here it is https://www.google.rs/search?client=ms-android-huawei&biw=360&bih=330&tbm=isch&sa=1&ei=AKk_WuU30KGwB57ahfAE&q=pirate+pi+metal+detector&oq=pirate+pi+&gs_l=mobile-gws-img.1.0.35i39k1l2j0i8i30k1l2.3859.3859.0.5740.2.2.0.0.0.0.125.125.0j1.1.0....0...1c.1j4.64.mobile-gws-img..1.1.124....149.tvn_dZn0wN0#imgrc=NuHWkG7h0Gxf_M:

2ctiby

8 years ago

You need an earth on the battery negative like rich11292000 said, an 8 Ohm resistor to replace the speaker, and a thorough check of that internet schematic to ensure that all of your values are as described there....including battery voltage, variable resistor, capacitor nF not uF if stated etc.... there is no point in asking for help here whilst your schematic is not copying the internet schematic.

forthekek

8 years ago

Why?

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