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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |