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pic16pro help
hi
i have this problem before.it caused two problem:
1.ur pic micro is out of work and it is unusable.u should chang ur ic
2.and the second one that i think it is the reason and i have this problem is that the output port of ur programmer dosn't match with ur computer port.u know...
hi all.i want a circuit that convert 220v AC to 12v DC without using transformer.i want it give me not less than 40 or 50 mA.and also it costs so cheap.its better not using an ic.
thanx very much
movment sensors
hi
i want to know is there any IC spicially for movment sensors.
plz give me the number or if u can the data sheet of these IC's.
thank u very much
power fan transistor
hi
u know controlling the speed of fan is in three bias:
1.cutoff mode:in this mode the fan is off because all the supply voltage is beetwin C and E
2.active mode:in this mode u can change the speed by changing the BASE CURRENT ..u can use a potansiometer or volume to...
hi
i want to know how we can use an audio amp with +vcc and gnd power supply without using the output capacitor...and if we can do it what happen to the dc voltage in the output of amp....because the capacitor reduse the quality and the bass of system
thank u very much
transistor audio motor
hi chuin the output of audio amp u want to fortificate a signal so the transistors should be biased in active mode...but when u want to drive a fan u just want to controll the fan just like a swich...so the transistor should be in saturation and cutoff mode....it means in...
hi
lets see ..u can do it very simply just by two relays.
if the signal is high one relay that is connected to the first voltage is active and the voltage goes to the output
and when the input is low another relay is active and another voltage goes to output.u can control it by just one not gate...
key bord decoder
hi
i want to decode a 4*4 (16 matris)key board
is there any ic that can do this for me(i mean scannig and decoding to binery)
just 1 ic
thank you
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