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Discussion Title Created date
C like tool for CYCLONE III
Hi there, I just bought my first ALTERA CYCLONE III development kit. I red that there are C like interpreters for FPGAs. Is there any free tool that I could download for testing...
Wednesday, 23 July 2014 - 11:12
Dual Dot-Matrix Display product
Hi there, I am currently designing a new product using 2 pieces of the attached display. I finished with the PCB design but unfortunately I realised that the final price is out of...
Thursday, 3 July 2014 - 09:53
A very difficult problem !!!
Hi there, I would like to ask your opinion and help about a specific problem. I am working on an elevator door operator electronic pcb. During the real test I came across a...
Wednesday, 28 May 2014 - 12:08
PID controller question
Hi there, It's my first time of implementing a PID controller for DC servo motor speed control. Untill now I used a custom control function that was just add or sub the constant...
Friday, 2 May 2014 - 08:39
CATV system
Hi there, I need to find/buy a complete CATV system for elevator usage. The system has to handle the monitoring of 8 separate TV screens. The control station (PC + external...
Wednesday, 2 April 2014 - 05:35
Audio Design
Hello there, During my new design I came across a problem that I can't solve. The system is an intercom consisting of 2 terminals that are connected with 2 cables. Each terminal...
Thursday, 20 March 2014 - 06:44
ATMega48PA clamping diodes
Hello there, According to the ATmega48PA datasheet "All I/O pins have protection diodes to both VCC and Ground...". In my case, I would like to use the PD6 (PCINT22/OC0A/AIN0), as...
Tuesday, 18 March 2014 - 08:38
transfer signal via wire question
Hi there, I would like to send a signal via a wire about 30-40 meters length (max). The signal is produced by an AVR PWM output (10bit, ~20Khz, 0-5V) and it contains audio data. I...
Wednesday, 22 January 2014 - 19:50
Intercom design
Dear avrfreaks, I am going to make an intercom design. It's my first time of doing something like this. The final system will always consist of only 2 terminals connected with a...
Tuesday, 21 January 2014 - 07:31
ATmega2560 SPI SS' pin
Dear avrfreaks, During my current project and after ordering the PCB I red one think that I never red before. In the datasheet of ATmega2560, SPI unit it says that in Master SPI...
Tuesday, 21 January 2014 - 07:21
design question
Dear AVRFreaks, Please see .jpg attached. The OPAMP's Open Drain output is controlling the base of a NPN BJT. Because of the OPAMP's Open Drain output Saturation Voltage, I would...
Thursday, 9 January 2014 - 07:06
AVR SPI and ISP
Dear AVRFreaks, During my project I am going to make the PCB design, but before this I would like to ask you one simple question. I am using the ATMega2560 at 5V Vcc. In my...
Thursday, 9 January 2014 - 06:39

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