epemag

[radium98]

ANy of the the forum members , have experience with the project of epemag EPE magazine ?

[Albert H]

Which project?

[radium98]

Vupeak meter the lcd does not start.

[Albert H]

Can you scan the article so we can see it here?

My favourite VU / PPM uses LEDs. It's a really simple circuit, you can adjust the step sizes and the number of steps. My original one uses LM339 quad comparators, and a LM3900 Norton op-amp for the rectifiers. It's reasonably easy to get it set accurately, and to get a BBC-style PPM characteristic. I have switchable modes of operation, allowing the display of both channels indepedantly or M and S components.

I've recently been experimenting with processing the sum and difference signal separately, to see if there's any advantage to be had. The M & S display has been very useful.

[radium98]

LCD UV Meter.rar

Albert .Yes i have the magazine issue , and and saw many on the web has done it succesfully , and i want to make it a digital way to put at th my banch , it use a pic 16f88 , i dont need any led .and the magazine is in the UK .So some hand to see what is wrong at my end , if you want to help me .
someone done it .

and mine pcb .NB i have debugged everthing regarding to schematic , voltage .connections and tracks.
Thanks for help.

[radionortheast]

I could only manage the one transistor fm microphone, in epe or electronics world though I loaded it up with 2n2219 transistor, was the first time I recieved a signal in some woods about 1 mile away, weak but there. When I had to change the frequency it wouldn’t work, veronica came along (I don’t know when adverts started appearing) I soldered up the 1w stereo, took all day never expected it to work at all never heard anything like it, I got a fully quieting signal at the same place, I went through every kiss in ibiza, gatecrasher, essential selection cd, it was the most fascinating thing. I suppose nothing can help you here, I was only looking through these magazines the other day through the world radio history archive, trying to find adverts https://www.worldradiohistory.com/UK/Wireless-World/ .
I don't think i'd want to atemp many of the projects even now lol, there are a very useful circuits, in one of the magazines they would get obsessed by distortion in audio amplifiers, how to measure it, can imagine them parading around in a pair thd tights, lol the whole thing became about thd, you'd think give it a rest. best left to hannah fry or wenesday addams or I don't know who else would do that