Type in the full discussion title or a part of it.
Discussion Title Created date
Trying to simplify this LED driver
I am trying to drive a super bright LED from a Raspberry Pi, the Pi's IO operates at 3.3V. However I have a 5V supply to supply the LED.   I designed this circuit, but...
Tuesday, 22 June 2021 - 15:24
Ethernet magnetics/transformer for Passive POE
So I am venturing into the world of ethernet interfaces. And adding passive POE while im at it (where pins 4&5 carry positive voltage, and 7&8 carry gnd). I am trying...
Friday, 21 May 2021 - 01:15
Inverting Buffer, awkard legacy layout
All the inverting buffers I can find, use this awkard (to me) layout: e.g. hc4049   Generally in the MCU age, one may be interfacing to a port. In which case its much...
Wednesday, 14 April 2021 - 16:37
HA-5002 Unity gain buffer but doubles the output Voltage?
Hi guys, I found a component (HA-5002) that's like perfect for my application. Heres the datasheet: http://www.intersil.com%2Fdata%2Ffn%2Ffn2921.pdf   The datasheet states it...
Monday, 22 February 2016 - 21:47
Fast Transistor Switching using Cascode configuration
Hi guys, I was reading in a textbook called the "The Art of Electronics". Under Transistors on page 103 it talks about the miller effect (the capacitance between the base and...
Sunday, 21 February 2016 - 23:52
Run an inductor twice current if half the duty cycle?
Hi guys,   I am looking at a buck switching regulator, but the inductor for it is very large in expensive. The price suddenly goes up. However if I go for half the current...
Thursday, 24 September 2015 - 12:09
ATmega8515 - OCR0 wont be set.
Hi all, I am in a big rush so any help will be greatly appreciated. I am using; WINAVR GCC with AVR Studio 4 with a STK500 to program a ATmega8515. If I goto project ->...
Wednesday, 6 August 2014 - 09:29
What power supply makes an AVR "Happy"?
Ok heres the scenario, I am playing with LTSpice trying to make a nice smooth SMPS (32Khz) power supply for my AVR. I can throw big caps and big inductors at it to get a nice...
Saturday, 19 March 2011 - 22:18
Atmel ARM SAM7X128, how to physically program it?
This is probably the dumbest question on avrfreaks... But how to I connect a SAM7X128 to a computer so I can program it? http://www.atmel.com/dyn/products/product_card.asp?part_id...
Tuesday, 15 March 2011 - 15:25
Hunt for the missing clock cycle, where?
Hi, I wrote a macro for a delay procedure as follows: ;--------------------------------------------------------- ;@0=COUNT (16-bit value to count to, each count takes 8 clock...
Wednesday, 19 January 2011 - 16:43
Trying to Understand Qtouch method of touch sensing
Qtouch describes their method of touch as "charge transfer signal acquisition technology". I have been trying to understand it. Only working with one single key. I presume Qtouch...
Wednesday, 1 December 2010 - 09:34
Cannot find a good solution, P-CH MOSFET Array
Hi, I have been trying to find an elegant solution for my problem for about 4 months now. But I have been stumped. I know there must be a way out there!! I have these different...
Tuesday, 29 June 2010 - 07:54

Pages