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lm7805 external transistor
haker_fox, EXACTLY kind of answer I was hope!
Should I measure currnt by putting ammeter between posetive power leads between router and 7805?
Can you also show me some tried and tested mc34063 based circuit except one in datasheet alerady please?
How much current...
lm 7805
Hi, how to check check current consumption of DSL router?
I have got ammeter.
On router nothing written as it is cheap router. Only voltage given as 5v DC.
Added after 5 minutes:
Yes! So my question is why 7805 get hot only when I connect to router but not IC (voltage drop by 7805...
max232 application
Yes! I have uses these values too withotu any problems!
But my question was what type of caps to use (electrolytic, mylar, ceramic, etc); not what values to use :-)
max232 capacitors
What kind of caps to use for MAX232 charge pumps?
I see some people use electrolytic caps and some ceramic caps and both are working reliably at 56kbps without any data loss/corrpution.
So how to decide what type of caps to use?
lm7805
I have 12V step down transformer. This I connect to LM7805 or LM7809 after diode bridge.
I been using this setup for long long time to power microcontroller and other IC based circuit.
Recently, I connect DSL router that take 5V input to output of LM7805 and both LM7805 and transformer...
area of sine wave
OK.. but let me tell you whay I say square have more power.
I connect speaker to electret mic. Mic connected to opmp and then to dso.
1. Now when I feed 5Vpp sine wave I get 2Vpp on DSO.
2. Now when I feed 5Vpp square wave I get 3.2Vpp on DSO.
You see my troubles :-(
square sine wave
Audioguru, what you say match with meter output but I still confused. FvM know a lot and he say something other.
What is correct? Wikipedia entry not show anything :-(
energy of sine wave
I confused. Say I have both square wave and sinewave of X Hz.
Now I see both have area unders curve the same.
However, in all experiments I do, I see square wave seem to have more power!
Basics tell me square wave have not only sinewave of X Hz but also odd harmonics of...
usb jdm2
Ok, question:
1. If I put 13V on MCLR then PIC will be programmable?
2. In this state I put PGD, PGC so it program?
3. If I not need verification then no need to supply 5v to Vss at all?
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