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Topic: Frequency Counter Kit from sparkfun (Read 2906 times) previous topic - next topic


Hi, I'm not new with arduino, but I'm new with kits. I just bought and assembly the Frequency Counter Kit from sparkfun. Does anyone know how do I turn it on... or may I have assembly it wrong that is why it shows nothing?


The schematic doesn't show a switch - you have provided 5V power?  You have checked every connection?
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]


Dear MarkT

Thanks for answering, yes I connected it with arduino to give 5vc suply. The thing is, I`m not sure if I sold it correct because I couldn`t find a picture that ilustrates it and I can`t read the schematics.. I just followed the print graphics on the board. The care I took was to put the capacitor on negative corret position. My question is, once we put the 5vc suply does the monitor should start imidiatly?


Usually it helps to provide a link to the device you actually bought, so people
don't have to guess.


Sorry, this is the device: https://www.sparkfun.com/products/10140


Jan 15, 2013, 04:23 am Last Edit: Jan 15, 2013, 04:25 am by Docedison Reason: 1
If it doesn't light up.. you made a mistake in assembly. I've taken the liberty of attaching the schematic and aside from the connectors and socket there are only 12 parts besides the controller.. As Always re-check your soldering, inspecting for bad solder (Bridges) or no solder.. skipping a pin is a common error.. After 50 years I still do that occasionally.
There is no power switch so I dearly hope you didn't connect it to Anything But 5 V DC as it would damage both the display and the processor.
There isn't a lot more that bypassing and the crystal and load cap's.. A TTL 74S90 would extend the frequency range by a factor of 10 as 'selected' 74S90's can go to 100 MHz, divide by 2 and then 5 for a total of a factor of 10 division of the input signal. But that's for later... need to get it working first.

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Dear Bob, thanks a lot for you help, sure after what you told me, I made a mistake in assembly. For sure the I connect in 5 VDC because I used an Arduino bord connected on computer by usb as source of enerfgy. I'll try reassembly it and also I'll buy another kit and try it again. Could you send the the schematic for my email? I don't know why I couldn't download it from here. my email is this login + @eba.ufmg.br . Thanks. Marilia

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