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Hi there,   I already built a constant current source (using a NPN BJT, a N-MOSFET and some resistors, 30mA) that drives a red laser diode (I bought it from ebay for 1$). I...
Thursday, 13 June 2019 - 07:52
LM258D question
Dear freaks,   I am using an LM258D opamp connected as a comparator, beeing supplied by single voltage 5.1Vdc. Would you be able to tell me what it's gonna be happen if the...
Friday, 22 September 2017 - 07:46
Division only with bitwise shifts
Dear freaks,   I am using the ATmega64A controller and I need to make a division with the faster (as possible) method.   ====================== The division I need to...
Friday, 24 February 2017 - 07:57
TEKTRONIX TDS 2014 broken pcb
He there,   My TEKTRONIX TDS 2014 is broken and cannot measure anymore. TEKTRONIX service man wasn't helpfull with me and just wanted to sell me a new model.   So I...
Thursday, 17 November 2016 - 06:27
RS485 interface 3.3V and 5V
Hi there.   I have some products that use the SN65HVD3082ED (RS485 5V tranceiver). Now I am bulding a new product that uses the SN75HVD12DR (RS485 transeiver 3.3V). ...
Tuesday, 24 May 2016 - 07:33
IAR question
Hi there,   During the customer-supplier agreement of a new project the customer need to have the IAR project of the microcontroller.  According to the same agreement...
Friday, 26 February 2016 - 12:53
AC switch (230Vac or 24Vac) maximum 1A output
Dear freaks,   I need to design a new product that handles 20 separate AC output switces (not dimmers). The characteristics are :    Each output must be able to...
Monday, 18 January 2016 - 10:39
ATmega48A and TPF-2A load cell ???
Hi there,   I am wondering of how to read (via the AVR ADC input) this device:   http://transdutec.com/catalogo/T...   I am using ATmega48A micro.   Any help...
Thursday, 20 August 2015 - 11:42
op amp 36V supply with NULL pins
Dear freaks,   I am searching for a general purpose op amp with a 32V (max) power supply and nulling pins.   Can you help ?    
Wednesday, 15 July 2015 - 08:07
Car ECU and Alternator Regulator comunication protocols
Hi there,   I am trying to collect informations about the comunication protocols between a car ECU and alternator regulators.   As I red in the internet some of the...
Wednesday, 8 July 2015 - 07:17
ATmega48 and crystal 32.768 KHz
Hi there,   I would like to ask a simple question.   While reading the  AVR134 apnote (Real Time Clock (RTC) Using the Asynchronous Timer), I see that ATMEL...
Friday, 19 December 2014 - 13:05
AVRStudio 6 / Debug / Struct watch problem
Hi there,   I am using:   AVRStudio 6 IAR Embedded Workbench 5.11B (output format UBROF 8) JTAG ICE MKII    While debuging my project in AVRStudio 6 and need...
Tuesday, 9 December 2014 - 07:34