Announcement

**Sneshko** · 01-30-2013, 07:24 AM

Bravo аntonis !
Congratulations!
This is a very elegant solution to any MFD device!
Thank you very much!
Regards!
Sneshko

**Sneshko** · 01-30-2013, 07:40 AM

Dear Antonis!
Would you like to share with us your project of Frekvrencmeter the image below?
Schematic, PCB, Parts list ... The complete project?

Thank you very much in advance!!!

All Best!!!
Sneshko

**Geo** · 01-30-2013, 08:16 AM

It is better and maybe more cheap to buy from ebay a DDS generator with frequency read.
Then connect a power amplifier with a transformer and you are ok.

**Sneshko** · 01-30-2013, 10:39 AM

Thanks for the information Geo!

However, Serbia is not possible to pay Ebay.
Balcan is hir...
Regards!
Sneshko

**Geo** · 01-30-2013, 11:47 AM

Originally posted by Sneshko View Post

Thanks for the information Geo!

However, Serbia is not possible to pay Ebay.
Balcan is hir...
Regards!
Sneshko

Very bad....

**antonis** · 01-31-2013, 03:00 PM

8038 function generator circuit - Automotive_Circuit - Circuit Diagram - SeekIC.com

http://www.seekic.com/circuit_diagram/Automotive_Circuit/8038_function_generator_circuit.html

The figure shows the 8038 function generator circuit. Function generator formed by integrated circuit chip 8038 can obtain square wave, triangle wave and sine wave at the same time. Triangle wave can be generated directly by the capacitor discharge current. And square wave can be obtained by control signal. The sine wave is obtained by the broken line approx

frequency generator .

**antonis** · 01-31-2013, 03:05 PM

Google Search

http://www.google.gr/search?hl=el&q=8038+fuction+generator+schematic&biw=1280&bih=923&bav=on.2,or.r_gc.r_pw.r_qf.&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=_5MKUc-pEcGl0AWn6YGACQ#um=1&hl=el&tbo=d&tbm=isch&spell=1&q=8038+function+generator+schematic&sa=X&ei=AZQKUd3yC4uY1AXPvYGQBw&ved=0CEwQvwUoAA&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.41642243,d.d2k&fp=7eebf518e32e2205&biw=1280&bih=923

**Sneshko** · 02-01-2013, 08:07 AM

Thank you very much antonis!
Regards!
Sneshko

**goldfinder** · 03-14-2013, 04:20 AM

The 8038

This chip has been around for years. It is fine if you don't care about frequency accuracy. It will drift in frequency depending on ambient temperature so if this is for some kind of electronic dowsing and you want frequency stability this is not what you want.

Also, what is this thread doing in the dowsing section? It should be LRL sections.
Goldfinder

**goldfinder** · 05-04-2013, 04:43 PM

Crystal vx RC oscillator

Originally posted by Geo View Post

It is better and maybe more cheap to buy from ebay a DDS generator with frequency read.
Then connect a power amplifier with a transformer and you are ok.

Geo has the right idea on this. Buy a simple off-the-shelf signal generator and amplify the signal (as if amplification does anything!). The chips that use a RC network to get the frequency (e.g. 555 or others) will drift because of temperature changes and the resistor and capacitor both change with temperature, the cap more than anything, so the original frequency being generated changes. A crystal driven or PIC driven signal generator is much more stable.
Goldfinder

**reza vir** · 04-04-2014, 06:16 PM

Originally posted by antonis View Post

FUCTION GENERATOR

4shared - free file sharing and storage

http://www.4shared.com/photo/kSyK4Hfx/8038_function_generator_circui.html