# Which frequency generator do you recommend me?

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#### J_Nichols

##### Member
Hi, I am just looking for a frequency generator that is capable to output sine wave at some kilohertzs (over 50 khz) and 12 volts. I had one but I gave to a friend, so I want to purchase a new one and I have seen some one on eBay, but I'm afraid of buy a very bad one. I want to spend around 30 USD. A simple one would be ok.

Which one do you recommend me?

Thanks.

#### unclejed613

##### Well-Known Member
that's kind of a vague description. do you have a particular use in mind? your price point is going to be difficult to meet, even with used equipment. the "12 volts", is that peak-to-peak, RMS, or what? does it need variable or fixed frequency? your question is similar to walking into a hardware store asking for a wrench without specifying what type of wrench, or what size wrench

#### ronsimpson

##### Well-Known Member
frequency generator that is capable to output sine wave at some kilohertzs (over 50 khz) and 12 volts.
https://www.banggood.com/ICL8038-Si...-p-1264217.html?rmmds=search&cur_warehouse=CN
Look at this one!
https://www.banggood.com/DDS-Functi...-p-1056452.html?rmmds=search&cur_warehouse=CN
I know this will not work for you but:
https://www.banggood.com/1Hz-150Khz...-p-1270834.html?rmmds=search&cur_warehouse=CN
This is from China. Watch every word when you read. "14Vp-p" is only 7Vpk or 5V rms. So when they say "14V out " you need to know what type of voltage.

#### ronsimpson

##### Well-Known Member
I know this is 2x more money than you want to spend ($60 for the 6mhz version). There are faster versions but more money. https://www.banggood.com/MDS-3200A-...cy-Meter-TTL-Wave-p-1057641.html?rmmds=search ------------------------------------------------------------------------ https://www.banggood.com/DANIU-FY32...1157268.html?rmmds=detail-left-hotproducts__6$50.00

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This is the one I was looking for. \$34.00
https://www.banggood.com/FG-100-DDS...z-p-942123.html?rmmds=search&cur_warehouse=CN

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#### unclejed613

##### Well-Known Member
i often get a chuckle out of the names of some far east companies. i suppose it loses something in the translation. there are several ways "bang good" can be interpreted in english, a) they used to manufacture fireworks before switching to electronics, b) you get a good product made quickly, c) our products are so good they instantly get your attention, or d) (NSFW, not fit for an audience including minors...)

i suppose the software includes a way to build arbitrary waveforms? that could be a very handy function....

#### dr pepper

##### Well-Known Member
I'm surprised at the cheap one posted above, sounds almost too good to be true.

#### unclejed613

##### Well-Known Member
it's probably a cheap clone of something more pricey. a few years ago DDS chips were expensive, but i guess once they are made in huge numbers the price comes down. that seems to be a constant feature of the silicon market.

#### ronsimpson

##### Well-Known Member
I'm surprised at the cheap one posted above, sounds almost too good to be true.
From experience; I can not get the raw parts at high volume pricing for what you can get the finished product, delivered.
If the US workers, forked for free and I got the lowest cost China parts, we could not compete. Then add import duty to the parts and not to the finished product we really can not compete. Sorry should not bring that up again. Please don't get off on why we can not compete.

If some one wants more little signal generators to look at there are more. Most are copied from the schematic in the data sheet. There is no real design involved.