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Once you have a working receiver, you can try using the piezo buzzer and 1n34 datasheet what it does 1n34 datasheet how it changes things – but that is an experiment for AFTER you have a working receiver.
Use a proper crystal radio earphone! Being a kid, of course, meant that I never got things really good enough. How did I miss that? 1n34 datasheet guess it didn’t help that I tested this radio outside in -5 degrees Celsius. Sign up using Facebook. Sign up or log in Sign up using Google.
Get it working right, first, though. From my own experience in building crystal dtasheet, you would be well advised datashwet build the first one using exactly the parts recommended and exactly the schematic 1n34 datasheet someone who has built one successfully. Isn’t a crystal earpiece just a piezo buzzer? They both use dxtasheet piece of piezoelectric crystal to work.
The typical load on a 1N34A diode in a crystal radio is a crystal earpiece with an impedance of 20kOhm. Back when I was younger I got a crystal radio set kit which included a 1N34A Ge diode 1n34 datasheet far as I 1n34 datasheet remember, I don’t have it anymore. Try locating an actual crystal earpiece and give it a go. A piezo buzzer is meant to BUZZ at a particular frequency. I think that “a piezo buzzer” today isn’t comparable to a crystal earpiece. The 1N34A will conduct 0.
1n34 datasheet at this one: Another thing to keep in mind is that they don’t have fanstatic range. You need the crystal 1n34 datasheet to avoid loading the tuning circuit and to keep the Vf low enough for the diode to demodulate the signal.
Post as a guest Name. Would 1n34 datasheet still be a suitable replacement for a Ge diode? The 1N34A conducts much smaller currents with a lower Vf.
If not, I hath been 1n34 datasheet astray datxsheet this link and videos. Whether and how well it works at other audio frequencies is anybody’s guess. MichaelK 2 It may well be the diode that is causing problems.
1N34 데이터시트(PDF) – Semtech Corporation
Look at the graph above – datasheeg uA flowing I bet the forward volt drop is probably 0. The answer lies in a combination 1n34 datasheet things.
It also indicates that most schottky diodes aren’t really good for crystal radios.
I tested it indoors as well though and it still didn’t work so it wasn’t exclusively the 1n34 datasheet. Thank you for your answer and the clarification about why I need a low Vf and crystal earpiece. A buzzer is made to work specifically at a particular frequency. As you can see from this diagram from here, 1n34 datasheet 1N34A will conduct 0. Interesting you mention temperature. They are finicky enough that even slight variations will cause a failure – substituting parts is just asking for trouble.
With a lower If, Vf is also lower. Here’s link to a site about crystal radios with some hints about schottky diodes: According to that site, you 1n34 datasheet need a bias current for most schottky diodes to get good performance.
I heard no sound from it through a piezo buzzer pressed against my ear and figured it was maybe because of the diode, so 1n34 datasheet looked around for the datasheet for the 1N34A to read its characteristics. Thanks again 1n34 datasheet your replies. Since a crystal earphone draws very little current, Vf is also lower.
It all comes back to building the receiver right with all parts as specified, then you can start experimenting with buzzers as earphones or using 1n34 datasheet diodes, etc.
This ties back in to what I said about building the first one right with all the right parts.