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PTC heater mistery
I found one more thing that i cannot understand.   I have a ceramic heater. Presumably  it is based on PTC. As we know, PTC increases resistance when temperature rises....
Tuesday, 9 April 2019 - 12:45
Strange waveform shift on o-scope
I have an USB p-scope and wanted to measure delay that current clamp introduces  to measurement. My setup:   O-SCOPE: Hantek DSO 6074BC Current clamp: Hantek CC-65 BNC...
Sunday, 7 April 2019 - 05:41
Multiple resets on arduino when plug into USB
I use arduino boards, but program them in C in AS7. Very simple code     // debug led on D13 (PB5)     DDRB |= _BV(5);     PORTB |=_BV...
Sunday, 3 December 2017 - 21:24
Is my Atmega1284P on Melzi board dead?
Hello!   I have a 3d printer with melzi 2 clone board with atmega 1284P Schematic http://reprap.org/mediawiki/imag...   I just had a short circuit on Z-STOP and after...
Saturday, 2 December 2017 - 21:52
Dual powering arduino. Possible problem?
I looked at the powering schematic for arduinoi nano. Docs say that if i need to use external power i must connect it to +5V pin which is used as +5V output pin when powering from...
Thursday, 30 November 2017 - 08:25
How to really make one click device programming in AS 7?
I am working with arduino boards (nano 3.0) but program them via AVSIPmkII clone (ZeptoProg v1). Programmer works fine, i can go to device programming and flash the .elf file But...
Friday, 20 October 2017 - 14:38
Lost in QMatrix , AVR32 power evaluation and 128K sram
Hello! I am choosing a MCU for a project. This is a potentially commercial project, so i need to think about cost optimization. The basic requirements are to have a touch pad and...
Thursday, 23 January 2014 - 15:32
Need help with AT90PWM and DALI
Hello! I want to create a DALI slave for the OSRAM DALI control gear i already have. Fro the datasheet of AT90PWM (which has DALI mode) i don't understand what extra components...
Tuesday, 26 June 2012 - 19:14
Controlling many RGB leds with per channel/per led PWM
I have a project where i need to driver 4 sets of RGB leds (each set is 2 RGB leds). Each set must have per color PWM control, so, totally i need to control 3x4=12 color channel....
Wednesday, 30 March 2011 - 05:22
Y/X EMI caps and a case for a DIY power supply
I am planning to build a simple and reliable power supply for a projetc with MCU (atmega88), tons of RGB leds (20mA), IR receiver, FETs and stuff. The input is 220V/50Hz mains...
Wednesday, 16 March 2011 - 11:54
Need help with a compact power source for a project
Hello! I am planning a project on atmega44a (because of lower power and built in T sensor) and several leds which will be smoothly faded when needed. The leds: 1 RGB flux led...
Friday, 4 June 2010 - 07:11
Need help reducing output voltage ripple from MAX762
I have done a very simple schematic to get approx 15V from MAX762 from 2 NiMH AA rechargables. The schematic is like this: Currently i've done it on a bread boards and used 150uH...
Saturday, 15 May 2010 - 09:01

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