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  1. wdariusw

    Relay output

    Hello. I have six 230V input signals (from room thermostats) . I need to have relay output if all of them are active. So, i do not have idea how to do that without 7 relays. How it is possible to do using other electronic components and one relay ? Any ideas ? Thanks !
  2. wdariusw

    LED strip power supply

    Hello. I have 16pcs 9.6W/m led strips. I want to connect all strips in parrarell. What power supply i need ? 160W ?
  3. wdariusw

    RF signal strength

    Hello. I have my car remote key, and there is strange thing. If PCB is in key fob (original, plastic), car remote work in about 2 metres. If I'm holding PCB in my hand, remote works from 20 metres. Whats is bad here ?
  4. wdariusw

    LED STAIRS

    Hello all. Just bought my own house that is under building phase. I wish to have led stairs something like this: What is the best choise for led and MCU wiring ? Addressible led strips ? Maybe someone of this forum have done that at own house ? Sorry for bad english. Thanks ! :)
  5. wdariusw

    PWM led without timer

    Hi. How can i do smooth pwm using delay loops ? I tied like this: int period; int i=0; while { i++; Turn_LED_off(); _delay(i); Turn_LED_on(); _delay(period-i); if (i>=period) {...
  6. wdariusw

    Coil replacement

    Hi all. I have a headache.. o_O I need to find replacement for car transponder coil... Original coil have about 920uH inductance and about 30 Ohm resistance. There are "replacements" from aliexpress...
  7. wdariusw

    High frequency pcb footprints

    Hi. I wonder, if PCB have trace-antenna , and pcb RF output is 433mhz, it is very important smd components footprint shape , if they are connected to antenna? Thanks !
  8. wdariusw

    Altium PCB image background

    Hi all. I need to copy exact PCB, and there is complicated trace-antenna. Is there possibility to add image in background of routing PCB ? Like in photoshop "transparent layer" . Thanks !
  9. wdariusw

    Small Inductance meter

    Hi friends, I'm doing some repair works, and there are lot of smd parts, like capacitors, resistors and inductors. I have MASTECH MS8910 for C and R components, but i can't find properly meter for L. I know that one of inductors (0603 SMD) is 82nH . But i do not know other inductors values...
  10. wdariusw

    PCB panelization

    Hi all. Doing some PCB's , and have a problem. I need to do panelized pcb's like in this picture : Can it be done with altium designer ? Or it is another software ? Thanks
  11. wdariusw

    ESC for brusheless motor

    Hi all ! I bought that ESC http://www.ebay.com/itm/191369476754?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT and that motor http://www.ebay.com/itm/271868927455?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT . Also I LIPO battery for that. This is first time when i want...
  12. wdariusw

    Reflow oven

    Hi ! I need reflow oven for PCB soldering. Need your opinion about what to choose. Common oven from ebay is T962 , maybe someone got it ? It is worth the money ? Maybe there are better choice than this one ? Thanks !
  13. wdariusw

    Identify parts and values

    Hi. I need to identify some parts and their values. There are tantalum capacitor with marking A106 P187 (i think value is 10uF, but what is P187 ? ) . And other part is like transistor smd package with marking "NOt" and other transistor like part with marking "A69" but number 9 on side (see...
  14. wdariusw

    AVR DIY programmer

    Hi ! Maybe someone have schematics and code for avr programmer, that works with avr studio 5 and 6 ?
  15. wdariusw

    Schottky rectifier

    Here i have few questions (about diodes) . I need to rectify small AC voltage ~800mV . And here is question - what diode bridge i should use. I know that schottkey here are best, but... Making simulations with TINA-TI software. I have bought few this diodes...
  16. wdariusw

    Specify "shunt resistance" for current measurement

    Hi for all ! Measuring low current with multimeter now, but i want to do it with oscilloscope using shunt resistance voltage drop. How to calculate best resistance value for measuring ? It is 3V power supply, with multimeter i measured ~10mA current. So if i want that my circuit still works, i...
  17. wdariusw

    MSP430 measure power consumption

    Hi all ! I'm doing "energy harvester" with wireless sensor node that includes msp430g2553 MCU. Trying to measure power consumtion, but no do not go for now. Using shunt resistor (1k 5%) i have got 345uA for active and 320uA for LPM3 mode. I thout that is something wrong here. Measured using...
  18. wdariusw

    23HY56-25-4A stepper

    Hi ! I'm trying to try what this stepper can. I'm new with steppers. So, about 23HY56-25-4A stepper there not much info http://www.ms-motor.com/product_detail-30-en.html . When trying maximum speed, aproximately i have about 1.5 rotations per second, what is 90RPM. Can't find manufacturer RPM...
  19. wdariusw

    Voltage from rotation

    Hi all. I will try to do some experiments, but before it i want to make calculations to estimate the results depending on geometry, coil, airgap, etc. So, the idea is : magnets are spinning around the axis and at the end of coil voltage is induced. Coil is connected to electronic circuit. With...
  20. wdariusw

    Energy harvesting from solar panel

    Hi all! I'm doing some work about solar panels, power point tracking, batteries charging etc. Let's say - solar energy harvesting system . I do not understand load maching principle with PWM and buck converter...How buck changes the load depending on PWM ?
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