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Can you recommend RS485 chip
Hello, I'm about to use RS485 for first time. The interface is Modbus and maximum bus length is appx 100 meter. There will be 2-5 slaves on the bus. They will be talking back to...
Monday, 14 December 2009 - 12:55
Power Supply Woes
Hi Freaks I need some assistance in how to best distribute power in an application. The application have a "Base Unit" and a "Remote Unit". Remote Unit need to get power from Base...
Tuesday, 10 November 2009 - 20:26
Limiting current to external devices
I'm building an application that will have four output terminals. The end-user might want to connect a number of different devices to these terminals, ie mains relay, modem,...
Wednesday, 15 July 2009 - 17:14
TRIAC CIRCUIT
So I need a last word of wisdom. Following advices given in my other thread I've bought opto-triacs to trigger the power-triacs. Are my resistors reasonable sized? What to use to...
Wednesday, 8 July 2009 - 00:36
Powering Triacs
Howdy Freaks I'm a bit confused how to connect triacs. The triacs are used to turn on a motor which run at full speed for a couple of seconds, so there is no speed control...
Thursday, 2 July 2009 - 20:00
Need help on power supply
Hi Freaks I'm making my first attempt at a commercial product. I have succesfully written all code needed and now moving from bredbord to first prototype. When everything was on...
Sunday, 28 June 2009 - 09:39
continous load on servo
Hi Freaks! I'm using a Hitec servo to continously (several hours at a time each day) hold aload. When servo is at rest it draw 8mA, when holding my load it draw appx 100mA. Will...
Sunday, 1 February 2009 - 12:13
Anybody tried this LCD?
Happy (soon) New Year! I've been drooling for some time over these displays http://www.lcd-module.de/eng/dog... Anybody out there tested them in real life? I'm especially...
Tuesday, 30 December 2008 - 12:19
Connecting muxed ADC
Referring to this subject https://www.avrfreaks.net/index.p... I want to be sure I understanf this statement:Quote:The ON resistance only matters if you're passing current through...
Wednesday, 10 December 2008 - 18:50
Temperature compensation?
Evening Freaks I'm trying to make a circuit that takes a signal from my bass-preamp and outputs it to AVR ADC (m16) behave properly. All my attempts so far have been fruitless....
Monday, 4 February 2008 - 21:53
Program Counter
Hi, For many years I have used labels for code with conditional jumps like this: max_test: lds temp,max_heat ;else load MAX HEAT cp heat,temp ;if HEAT lower brlo old_max ;...
Tuesday, 18 September 2007 - 17:51
ADC broken
Hi ARR-freaks I am working on a project with Mega16 where ADC channels 0-7 are connected to NTC-termistors. Channel 6 refused to change it's value except when the channel read...
Sunday, 11 March 2007 - 18:28

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