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60Hz noise and a simple human finger probe question
Hi, I am chasing a amall 60Hz signal in an opamp design and have a few questions... What is the equivalent RC circuit for a human finger, using a wedding band as a grounding strap...
Wednesday, 26 January 2005 - 12:05
20 Mhz switch on my old analog scope, what does it do?
Hi, I have an old Tektronic CRT scope (it's huge!) military surplus. Works great for my needs. It has a switch on it: FULL 20 Mhz What does this do? I know the noise from http...
Thursday, 20 January 2005 - 18:32
Capacitive loading problem on SPI?
Hi, I just came across something and was wondering what you think about it. I put my prototype board about 5 feet away from my dev board using cat5 cable the other day - an easier...
Saturday, 11 September 2004 - 12:06
OT: PDSPs
Hi, any comments/experience interfacing 8 bit AVR to the programmable DSP chips? I looked at FPGAs, but right now their overkill for my apps. Thanks
Thursday, 9 September 2004 - 11:52
mA draw varies - will it interfere with the uC?
Hi, I have 2 pieces of hardware. Both are controlled by an analog switch. 1 is a small DC motor - the switch connects directly to the motor terminals. It will draw 125mA when...
Wednesday, 1 September 2004 - 12:20
SPI GUI
I can across this SPI GUI reading a datasheet on a AD5162 digital pot. Quote:An evaluation board, along with all necessary software, is available to program the AD5162 from any...
Monday, 30 August 2004 - 17:22
LED dimmer using current regulation: ideas and comments ???
Hi, I want to control LED brightness by limiting current, not by adjusting PWM. I think this requires a current regulator, but I am not certain so I need your help. Any comments...
Saturday, 21 August 2004 - 13:16
// Global enable interrupts #asm("sei") ???
Hi, What does this mean in "C"? // Global enable interrupts #asm("sei") I want to enable and disable OC1A on a M128. Do I need to adjust TIFR or leave it alone and work with...
Thursday, 29 July 2004 - 18:42
Can this routine go in an ISR?
This is the routine in main() right now... if(menu_toggle) // true if need menu refresh { menu_toggle = 0x00; // turn off refresh from ISR4 if (menu > 0x08) //...
Wednesday, 28 July 2004 - 20:41
External Interrupt Flag Reg EIFR Why Initialize to 1 ?
Jumping to interrupt vector??? I thought that is what always happens with an interrupt. I am worried I am missing something because the datasheet mentions it here. I also noticed...
Wednesday, 28 July 2004 - 20:13
Atmel Biometrics chip - any experience with it?
http://www.atmel.com/products/Bi...
Tuesday, 27 July 2004 - 00:28
FLIPSTER : a wiring template for STK200-500 ports
Flipster helps you transfer your chip pin-out to a 10 pin dual row header for the STK200-500 boards. It can be difficult to try and look at your chip pinout specification sheet,...
Sunday, 25 July 2004 - 16:38

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