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Resistor values 10E and 0E. What does that mean?
Hi,   I am reading a schematic that lists two resistors of values 10E and 0E.  Googled a bit.  Does this mean 10ohm and 0ohm, respectively?   Thanks.
Wednesday, 22 December 2021 - 18:53
Current consumption for logic chips
Hi,   I am looking to make a logic chip tester.  There are a ton of variety of logic chips out there, as I understand.  The two questions I have are, because the...
Sunday, 7 March 2021 - 21:53
how to amplify digital audio signal that is fed into an analog speaker?
Hi,   I built a simple wav player at (http://www.technoblogy.com/show?...).  It plays nicely; however, I would like to amplify the digital signal.  The article says...
Sunday, 20 December 2020 - 04:09
Accidentally program the wrong fuses to my ATMEGA644
Hi,   I accidentally programmed my ATMEGA644's fuses to have LOW FUSE: 0xC1 and HIGH FUSE: 0xDD.  From  https://www.engbedded.com/fusecalc/ , I see that the...
Sunday, 12 July 2020 - 00:45
Same ground
Hi all,   I am looking to make a digital clock, using one of Microchip's RTCC (Real-Time Clock and Calendar) chip.  The chip can retain the time/data when the system is...
Saturday, 30 May 2020 - 02:07
Basic question on buffered transfer of data on an 8-bit bus
Hi,   I am planning to use the 74HC245, which is a directional bus.  Say, the 74HC245 is between two simple pieces of firmware sending data to each other via the 74HC245...
Sunday, 5 April 2020 - 06:33
Do I really need to use the /SS pin for SPI between two ATMEGAs?
Hi,   When doing SPI communication between two ATMEGAs, I can configure one to be the master and the other slave.  Do I really need to make use of the /SS pin to select...
Monday, 15 July 2019 - 01:17
Generating a 4Mhz square wave/clock for the ATMEGA644P
Hi,   I am trying to generate a 4Mhz FAST PWM square wave from the ATMEGA644P that runs at 8Mhz off the internal RC clock.  Is that possible?  I have searched the...
Tuesday, 9 July 2019 - 01:00
I/O operating voltages between two ATMEGAs
Hi,   I have a system that includes two ATMEGAs, one is run at 3.3V because it interfaces with the SD card.  The other is run at 5V at max clock of 20Mhz. The 5V one has...
Wednesday, 12 June 2019 - 21:58
Looking for the below specific jump wires
Hi all,   I've been searching high and low for the below jump wires that I saw on Digikey, but Digikey charges an arm and a leg for them.  I would like to know what the...
Thursday, 6 June 2019 - 20:52
Attiny lock bits to prevent firmware from being read
Hi,   I am using the ATTINY2313, and I read in the datasheet that I can program the lock bits to prevent my firmware from being read, thus protecting my firmware.  ...
Sunday, 21 October 2018 - 15:01
Low voltage on old CPU, the MC68000 and MC68008 CPUs
Hi,   I am experimenting with the old CPUs.  Got some from eBay.  They are the MC68000 and the MC68008, both operating at 5V.   I basically wire them up on a...
Saturday, 12 May 2018 - 04:42