Joseph Johnson: Do you still have the schematic for this? It is no longer available from
Yash Desai: how did you made oscilloscope
furulevi: this goes to 7000 Hz only?
Ramses Faradis: Gran circuito.
Riskteven: I want to feed through a transformer to output an effective value of 230
Volts AC but with a variable frequency. I plan to upload something very fun
on Youtube but of course a sine generator is still what I need. How to do?
smokescreen36: could anyone help guide too a mini audio spot light
electronhacks: Coax would be better but a regular wire would work.
ElektroHut: have you tried any other op-amps. Maybe one with better slew rates, etc?
gypaete09: Don't know what the four diodes do? They act like a pos/neg voltage limiter
(2x0.6V), which due to the diode forward current characteristics transform
the incoming triangle wave to a "almost-sinwave".
Richard Wolfe: Simply cool.
Helge Sverre Hessevik Liseth: If you connect that to a speaker.... would it make sounds?
leviterande: maximum frequency??
electronhacks: @ElektroHut Nope I have not tried any others, to many other projects to do!
The1970sInfatuate: Man, that is frickin' awesome!
jeetendrag10acc2: could we buy then pre-assembled? i am not too good at assembly and
soldering,and i need a lower range signal generator.(not too expensive)
t4peworm: Hey where in the schematic did you add a light for power?
Kris Lonewolf: Can i use LM324 N Instead LM348 IC
humxa24: look up for a pinout diagram for both on google
Slovenija12345: its something wrong if i use polyester capacitors??
Shadi Soundation: Great !!!
MostElectronics: nice job!
Jeri Ellsworth: Good job.
garrett Baldwin: set your trigger
Kris Lonewolf: Thank you man!
Sophie333C: Hi, built this function generator on breadboard, I managed to get 7.6kHz
output. The waveforms are ok at low frequencies, but not too good as you go
up the frequency range!
Rui Santos: For the output waves did you use which type of wires? Coaxial wires? or
just normal wires? thanks... if you want your led blinking you can add to
the circuit a 555 IC and it will easily blink the led... i hope it helps you
Christopher Chang: This is great work! I'm actually working to try to build a 7400 based
function generator but there's a lot of issues I'm running into with the
sine wave atleast. I may have to abandon it because your design looks much
nicer than mine :)
electronhacks: It is easy for you to do this type of research, do a search for the IC's
name and "Datasheet" (You will need this if you plan to use the IC anyway).
It looks like the pin-out is the same, the IC's are similar so since we are
making a fairly crude device chances are you can safely substitute the
IC's. That however does not mean you will not need to do some
experimentation and possibly modify the circuit.
Kris Lonewolf: It's Working i just assemble this device and it works fine. But i have one
problem i want to put one led diode to blink on output signal. i put single
led diode with 220 ohm resistor on output and led blinks slow and fast
depends of potenciometer bat when i put some load on output led stop to
blink. i dont want connect led just on power supply i wanna led to blink.
can you tell me how to resolve this. Thank you
Kris Lonewolf: I have same question i found only LM324N can somebody know is this same
type of Chip
Rui Santos: thanks i will try this circuit soon, thanks for the reply! Good luck with
Zach Sylvester: battery almost expired
Suli Tavi: Could you use a different op amp to have a bigger frequency? Could you tell
me if this is posible? to have a frequency range greater than 7000Hz (e.x
could it be modified to reach 20MHz) with an quad op-amp ic?
sunnypiyush: Would the connections remain the same if i use LM324N instead of LM348?