Post Created date
Resistor values 10E and 0E. What does that mean?
grohote wrote: 10E= 10 Ohm (Ω)   Thanks! So, the 0E is basically 0ohm.  Below is the original schematic, R4 and R4 in question.  So, why would one put a 0ohm...
Wednesday, 22 December 2021 - 19:42
74LS Series IC Tester using AVR [AVR GCC - C] [NEWBIE]
I am looking to do the same thing, but I'll start with 14-pin logic ICs (PDIP format) first, since the key point for me is that the GND and VCC pins for 14-pin logic ICs are...
Monday, 8 March 2021 - 18:48
how to amplify digital audio signal that is fed into an analog speaker?
I found what can help my problem.   https://www.sparkfun.com/tutoria...   The  TPA2005D1 is a class D amplifier for 250khz signal!   * I fixed your link....
Monday, 21 December 2020 - 04:29
how to amplify digital audio signal that is fed into an analog speaker?
Quote: Some circuit examples and equations to calculate component values can be found here, for instance: https://www.maximintegrated.com/en/design/technical-documents/app-...
Sunday, 20 December 2020 - 21:28
how to amplify digital audio signal that is fed into an analog speaker?
Quote: I think the source of your problems is the 5v used for the amp, a higher voltage is needed to get louder sounds! Try using 12v for your amp supply.   I can try with...
Sunday, 20 December 2020 - 19:17
how to amplify digital audio signal that is fed into an analog speaker?
Quote: That would normally be called "hum"; a "hiss" would describe a high frequency sound - like the sound of steam escaping under pressure.   You're correct.  It...
Sunday, 20 December 2020 - 19:15
how to amplify digital audio signal that is fed into an analog speaker?
Flo1991 wrote: Your posted schematic amplifies your signal by 200. If your LM386 is powered at 5V your input signal maximum would be 25mV (single supply referenced) to stay below...
Sunday, 20 December 2020 - 17:35
how to amplify digital audio signal that is fed into an analog speaker?
js wrote: You may want to post the amplifier circuit you used. ie   The speaker now connected to the LM386's amplified output pin, but all I hear is garbles! Via,say, 220uf...
Sunday, 20 December 2020 - 05:12
Accidentally program the wrong fuses to my ATMEGA644
ka7ehk wrote:The only caveat is that the ISP clock MUST be no faster than 1/4 of that external clock frequency   Thanks!  I think AVRDude has such an option. ...
Sunday, 12 July 2020 - 22:46
Same ground
valusoft wrote: All of the "grounds" must be in common or there is no reference for the voltages present.   Ok. So that would be common to the VCC, the USB +5V in this case...
Saturday, 30 May 2020 - 03:43
Basic question on buffered transfer of data on an 8-bit bus
barnacle wrote: The traditional use of  a 245is to enable bidirectional communication between two busses. Which is what you want... you'd often find it, for example, between...
Tuesday, 7 April 2020 - 02:06
Basic question on buffered transfer of data on an 8-bit bus
I think you're suggestion is good, without clocking, as I had also thought.  The 74HC245 has a directional pin, which can act and input/output direction.  I think...
Sunday, 5 April 2020 - 20:18