Gadget Reboot
CANADA • + Follow
Description
DTMF Decoder 3.3v MT88L70
This DTMF decoder uses the MT88L70, powered by 3.3v and interfacing with 3.3v GPIO to decode the touch tone keys.
It has an RJ phone jack and 600:600 transformer to connect to a phone line to pick up audio, listening for DTMF tone pairs.
This is intended as a development/testing accessory, used with a phone line simulator (not connected to a live phone service).
If using it on a live telephone line, ensure all regulations and laws are followed.
Schematic and Layout
Design Files
https://github.com/GadgetReboot/DTMF_Decoder_3V3
Mar 19,2024
520 views
DTMF Decoder 3.3v MT88L70
DTMF Decoder breakout board with 3.3v logic outputs
520
0
0
Published: Mar 19,2024
Download Gerber file 0
BOM(Bill of materials)
Centroid file
PCBWay Donate 10% cost To Author
Only PCB
PCB+Assembly
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
Under the
Attribution-ShareAlike (CC BY-SA)
License.
- Comments(0)
- Likes(0)
Upload photo
You can only upload 5 files in total. Each file cannot exceed 2MB. Supports JPG, JPEG, GIF, PNG, BMP
0 / 10000
More by Gadget Reboot
-
40 Pin Cable ESP32-C3 based Test Platform
This is a test platform with 40 inputs and 40 outputs, using an ESP32-C3 Super Mini module with five...
-
Serial UPDI Programmer
USB Serial to UPDI programming board for Atmel devices in the Arduino IDEHas a 5v / 3.3v switch to c...
-
Op Amp Buffer with In/Out Guitar Jacks
The pcb has a guitar input and output jack to easily connect to a breadboard for guitar effect circu...
-
16 Channel Audio Loop Switcher
This is a 16 channel audio loop switcher with 16 inputs and 16 outputs.Analog signals within a +/- 5...
-
16 Switches to RS485 Output Commands
Up to 16 switches or 5v/gnd logic inputs can be monitored and when asserted (input = gnd), a sketch ...
-
MCP42100 Digital Pot Breakout PCB
This breakout board for the MCP42100 dual digital pot has headers that are spaced for breadboard com...
-
Power Supply DC Jack/Screw Term/0.1" Header Breakout with PTC
This breakout board allows connecting a power source via 2.1x5.5mm DC jack, 7.62mm screw terminals, ...
-
16x16 Analog Switch
This 16x16 analog crosspoint switch uses two MT8816 8x16 switch ICs cascaded for a larger matrix.The...
-
Line Level Stereo Input to 3 Stereo Output Sharing PCB
This audio sharing board will take a stereo line input from a 3.5mm jack, buffer it and send it out ...
-
MIDI Breakout In/Out/Thru
This MIDI breakout board has 5 pin DIN jacks and Type A configured 3.5mm TRS jacks for Midi In, Midi...
-
Tandy CoCo Joystick Adapter - Use Digital Inputs for Analog X,Y axis
Use 5v/GND digital signals to control the analog joystick input of a Tandy Color Computer.When input...
-
Capacitor Bank Switch Box
Capacitor Breakout BoardUse dip switches to put capacitors in parallel in 1nF increments from 1 nF t...
-
Op Amp Twin T Percussion PCB
This is an op amp percussion sound generator based on the Forrest Mims circuit in books such as Gett...
-
1/4 Inch TRS Phone Jack Breakout PCB
This 1/4 inch phone jack TRS breakout board has a 6 pin header forTip, Ring, Sleeve, Switched Tip, R...
-
NPN Transistor Breakout Board
This board can be assembled with machine pin sockets to allow swapping NPN transistors as well as co...
-
GPIO Addressable LED Indicators
This pcb can read 8 digital inputs and display their high/low state on one of 8 addressable LEDs as ...
-
Guitar Stomp Switch and LED Breakout Board
This PCB takes a 9 pin 3PDT guitar effect on/off stomp switch along with an LED and resistor, and pr...
-
HV5222 Breakout Board
HV5222 32 bit high voltage shift register breakout boardThe driver chip has open drain outputs that ...
You may also like
-
-
-
-
-
3D printed Enclosure Backplate for Riden RD60xx power supplies
156 1 1 -
-
