The document outlines various applications and projects using DTMF signals, including devices like line followers, water level indicators, and home automation systems. It mentions the use of RF434 modules in wireless applications of these projects. Additionally, it lists functional elements related to soldering relays and other electronic components.

1. GENERAL
ELEMENTS

2. Soldering

3. Relays

4. Relay

5. Relay

6. Relay Application

9. WIRELESS

10. RF434

11. RF434 MODULE

17. L
C
T
O

18. DTMF

19. 8870 FUNCTIONAL TABLE

20. DTMF

22. How DTMF signal can be Recived ???

25. PROJECTS

26. PROJECTS
1. Line folLower
2. Water level indicator
3. Solar power tracker
4. home automation
5. ROBO WITH CAMEA
6. ALCHOL ANALYZER
7. FIRE AND SMOOK DETECTOR
8. HEART BEAT MONITOR
9. LPG GAS INDICATOR
10. GPRS & GSM BASED TRACKING

27. Water level indicator