Post Created date
A way to reset something via a controlled short circuit?
An on/off switch is the best solution and not a crawbar circuit (which in normal conditions acts for a few mseconds only to blow a fuse),that forces the supply circuit to the...
Tuesday, 4 March 2014 - 22:08
What is zero crossing in triac? why is it needed?
Driving a triac is like an inverted PWM.The firing time of the triac is starting when the voltage crosses through zero.The time between zero crossing and the gate firing pulse...
Saturday, 18 January 2014 - 01:37
SMPS Design
Kartman wrote Quote: I would suggest you would have a better chance of success rewinding the secondary on an existing power supply transformer rather than learning all the theory...
Saturday, 18 January 2014 - 01:23
SMPS Design
If you have already a LIPO charger just buy a ready made SMPS from anywhere.Power intergation has a program for designing the circuit,selecting components and transformer winding/...
Thursday, 16 January 2014 - 01:14
problem driving relay
Test the circuit without the mcu by giving in the base of the transistor the mcu's vcc.Maybe its the pin driving configuration.
Monday, 13 January 2014 - 21:43
BGA soldering
For example the melting point of lead solder is 185C and for liquifying needed around 205-210C.Lead free is 217C and needed some higher temperature,225-230c or even higher.Some...
Monday, 13 January 2014 - 21:31
[SOLVED] TRIAC (220V 50Hz) With ATMega16 Problem
Snubbers on triacs always have a leakage current,if the load is too small it never shuts off as it happened in a circuit that i made to drive a tv from a terrestrial receiver.It...
Monday, 13 January 2014 - 01:39
Mosfets as relays
No,because mosfet need a reference voltage for driving and provides no isolation.Very small solid state relays probably can do the job,but personally i havent use them because its...
Thursday, 10 October 2013 - 18:58
Help for amplifying AC sine wave to 30kV sine wave....
As i remember another avrfreaks member told that on a previous thread long ago that tesla coils and ultra high voltage generators are the equipment that every mad scientist must...
Thursday, 3 October 2013 - 20:19
Convert decimal to hexa
As i think the conversion has a meaning only for displaying purposes,otherwise everything inside the micro are binary digits. The idea is x=4095; highnib=0; if(x>=16){ x-=16;...
Thursday, 3 October 2013 - 20:00
how to know the working frequency of atmega8
The clock frequency of the micro is exactly the double as i said from the frequency of the toggling pin because most of avr commands require one clock cycle. State one of the test...
Monday, 30 September 2013 - 21:11
how to know the working frequency of atmega8
Assuming that you loading the program from uart,so if you write an infinity on/off sequence without any delay between one and zero states and measure the frequency in this pin...
Sunday, 29 September 2013 - 19:31

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