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DEX interface on vending machine - How does the Vending Machine Device (VMD) detect a connection/disconnection with the Data Carrier (DC)?
I have some questions for those of you who are familiar with the DEX interface on a vending machine:   =============================================== 1) Signal levels used...
Monday, 11 April 2016 - 00:56
Vending machine protocols (MDB, DEX): SW implementation and HW interfaces
Hello, I was wondering if there are people here on this forum with broad experience in vending machine protocols (MDB, DEX): - SW implementation - HW interfaces - Devices to test...
Tuesday, 1 December 2015 - 16:08
Communication between Android phone and Arduino
This thread is closed. I found a solution using Google Protocol Buffers.
Tuesday, 1 December 2015 - 15:03
RPC library with support for any function prototype and also with support for callback functions
I am looking for an RPC library that supports any function prototype and that also supports callback functions.   Basically I want to trigger a specific C function on a...
Friday, 17 July 2015 - 12:38
Redirection of printf() is not working anymore
I have used the below code snippet in other projects successfully, but now it seems not to redirect the stream properly, as my debugger does not hit the breakpoint in the...
Tuesday, 25 June 2013 - 18:11
CLI interface in a terminal for AVR application through UART
Is it easy to implement a CLI interface in a terminal for an AVR application through the UART? I was looking for recommendations on implementing this. Would it be easier to...
Wednesday, 13 February 2013 - 09:40
Protocol for transfering data/files between AVR and Android
I am planning to use the FT311D chip from FTDI to exchange data between an Android device (USB Accessory mode), and an AVR microcontroller (e.g. ATmega640). The FT311D chip from...
Tuesday, 5 February 2013 - 21:36
Value of pull-down resistors
Hello, I have made a design with several Atmel microcontrollers. To make sure that the input pins are not floating, I have connected a pull-down resistor to every input pin that...
Sunday, 20 January 2013 - 13:04
AVR chip and FTDI chip libraries for Altium Designer
Hello, I was wondering if there is a central library or source, where one can find the following parts to use as component in Altium Designer: ATmega640 ATtiny1634 ATmega168...
Wednesday, 21 November 2012 - 15:30
Implementation of 74HC922 keyboard decoder on an ATtiny1634
The company that will produce my PCB boards informed me that the 74HC922 keyboard decoder chip is obsolete. The 74HC922 decodes 4x4 keyboard (4 rows/4 columns) into a 4 bit binary...
Friday, 2 November 2012 - 17:38
Software replacement for 8870 DTMF decoder on ATtiny1634
I am using a 8870 DTMF decoder in a design. The factory that produces the PCB boards informed me that this part is becoming obsolete, and that it is not advisable for new designs...
Wednesday, 31 October 2012 - 14:29
Properly clearing UART receive buffer and error flags
I have designed a microcontroller application that monitors the traffic on a serial bus. The microcontroller is an ATtiny1634. When I reset the microcontroller after the serial...
Tuesday, 2 October 2012 - 10:26