MFD

[ravinder71]

I want ask what is square out and triangle out in basic MFD ,where to connect

[WM6]

It is shape of signal.

[edward]

hi

[WM6]

Originally Posted by edward

hi

The same to you.

[UltraLRL]

It's shape of wave.

could connect to antenna or Ground Probe.

Using a selector to change between waveforms.

[reza vir]

see pic 8038
pin2 : sine
pin9 :square
pin3 :triangle

[UltraLRL]

Are you Going to change the 8038 frequency by changing the capacitors?? No Way!!

Timing Capacitor Only determine the frequency range!!

USE A POT TO CHANGE THE FREQUENCY!

take a look at this simple 8038 generator:


The Basic characteristics of the circuit with a few components. By have VR1-potentiometer, R1-resistors and C1-capacitors are determined frequency output. Which has formula to calculate the frequency output as follows.

The Frequency output (f)
= 0.15/(VR1+R1)C1


Changing Frequency by turning the VR1 pot!



Another 8038 Generator:



The frequency of the output wave form can be adjusted using R7 .It must be a 100K Log POT.



Another One:



The IC contains an internal square wave oscillator, the frequency of which is controlled by timing capacitors C1 - C4 and the 10k potentiometer!

[reza vir]

Information about IC 8038

[reza vir]

[UltraLRL]

Stop copying Datasheet! I bet you don't understand what I told

Take a closer look at Fig 8 (Variable Audio Oscillator , 20 Hz to 20 Khz).

The Best way to change the frequency value is to use a pot.

The cap timer value on pin 10 only determine the Frequency Range!
(Like in Fig 8. the 0.0047uF and the RA=RB=4.7K ===== 20 Hz - 20 Khz oscillator)

[pigeon]

Originally Posted by ravinder71

I want ask what is square out and triangle out in basic MFD ,where to connect

hi all

i search bcp for this version

thank you

[reza vir]

Originally Posted by UltraLRL

Stop copying Datasheet! I bet you don't understand what I told

Take a closer look at Fig 8 (Variable Audio Oscillator , 20 Hz to 20 Khz).

The Best way to change the frequency value is to use a pot.

The cap timer value on pin 10 only determine the Frequency Range!
(Like in Fig 8. the 0.0047uF and the RA=RB=4.7K ===== 20 Hz - 20 Khz oscillator)

I have brought all forms of use of the IC

[reza vir]

Originally Posted by pigeon

hi all

i search bcp for this version

thank you

pcb

[sirnon]

Good Tut
Thx for offer

[sirnon]

ravinder71, Have You built this circuit?