Project: How to Build Function Generator using XR2206 IC

Eltronicschool. - This is one of project to build function generator using main IC component XR2206 look like shown in Figure 1. The main component in this project is used XR2206 IC and 7413 digital IC.

In this project will show you the circuit of function generator with Sine-Triangle-Square wave form. You can get the frequency range from 1HZ up to 1MHz. In this project we will give beside circuit schematic, we also will give you component are needed and also global description.

Circuit Schematic

Figure 1. Circuit schematic of function generator using XR2206 IC (Source: www.eleccircuit.com)

Component Part

1. IC1___________LM7812 12V DC voltage regulator
2. IC2___________XR2206 Function Genertor
3. IC3___________LM7805 5V DC voltage regulator
4. IC4___________SN74LS00 Nand gate IC TTL
5. Q1___________ BC327 50V 800mA PNP Transistor
6. Q2, Q3, Q4_____ BC337 50V 800mA NPN Transistor
7. D1-D4_________ DB101 Diode bridge
8. D5____________ 1N4148 75V 150mA Diodes
9. R1, R2, R12______4.7K 1/4W Resistor
10. R3, R4, R7, R9___ 27K 1/4W Resistor
11. R5, R6, R16______1K 1/4W Resistor
12. R8, R13_________2.2K 1/4W Resistor
13. R10____________3.3K 1/4W Resistor
14. R11____________ 100K 1/4W Resistor
15. R14____________ 47ohm 1/4W Resistor
16. R15____________10K 1/4W Resistor
17. C1, C8__________ 1000uF 25V Electrolytic Capacitors
18. C2_____________ 22uF 16V Electrolytic Capacitors
19. C3, C7__________ 100uF 25V Electrolytic Capacitors
20. C4_____________ 2.2uF 25V Electrolytic Capacitors
21. C5_____________0.001uF 50V Polyester Capacitor
22. C6_____________ 10uF 25V Electrolytic Capacitors
23. C9_____________ 0.1uF 50V Polyester Capacitor
24. C10____________ 470uF 16V Electrolytic Capacitors
25. VR1, VR5 (Preset)__ 25K Potentiometer
26. VR2 Volume______ 10K Potentiometer
27. VR3 Volume______ 100K Potentiometer
28. VR4 (Preset)______ 1K Potentiometer

Description

Circuit schematic look like shown in Figure 1 above is function generator using XR2206 IC.  Eleccircuit site describe that the heart in working of this circuit is the IC XR-2206. All equipment except the power transformer 12 volts. We can assemble them onto the PCB, as shown below. You should solder correctly and successfully. After a successful check. Sure that the power supply to the circuit. And adjust the circuit.

The real application circuit as shown below It can be seen that the switches S1 to act as Frequency Range, which can be selected third range are.
1. 1-100 Hz
2. 100-10,000 Hz
3. 10,000-1,000,000 Hz

However, by selecting the capacitance value between pin 5-6.
First, adjust the frequency profile changing the value achieved by the VR3.

Next, VR2 is used to adjust the gain ratio of the circuit by fine with VR1 get the maximum output 1V. The VR5 is adjusted to balance the waveform.


Then, Switch SW2 is a select the signal output to a sine wave or sawtooth waveform.