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Is this viable for precison half wave rectifier ?
MBedder wrote:See Fig. 45-46 on page 17. This circuit is based on the fact that the op amp's -V supply is GND so it automatically cuts off the negative signal right ? And since...
Monday, 23 January 2012 - 17:07
Using ISIS as a simulator ?
What's wrong with the _delay_us/ms macro ? Why shouldn't I use it ? I managed to fix ISIS, it seems that ISIS is picky about the path of the file. The ISIS design file MUST be in...
Friday, 13 January 2012 - 15:55
Switch to short/connect two wires?
maximax wrote:ItsMike wrote:Wouldn't a CD4066 do the trick better than a relay ? (More efficient at least). And no need to reverse engineer if the switch is low/high side. My...
Friday, 13 January 2012 - 10:56
Switch to short/connect two wires?
Wouldn't a CD4066 do the trick better than a relay ? (More efficient at least). And no need to reverse engineer if the switch is low/high side.
Thursday, 12 January 2012 - 22:26
Medium distance proximity sensor.
I'm only getting a detection range of 30cm max or so with a TSOP4838. I'm driving the IR led through a 50ohm resistor at 38KHz and about 20% duty cycle which (about 75mA). When I...
Friday, 6 January 2012 - 21:30
Any pointers for bitbang ASK demodulation ?
It's full on/off at the moment, of course it can be changed easily. This just gave me the idea of maybe doing it full on and half on and interfacing it to the A/D. Is living near...
Tuesday, 3 January 2012 - 18:12
Any pointers for bitbang ASK demodulation ?
I already wrote the pc "driver", it does ASK at the moment. It is possible to change it to FSK. As I mentioned before I need reliability more than speed. As far as I'm concerned I...
Tuesday, 3 January 2012 - 16:38
Any pointers for bitbang ASK demodulation ?
Because it needs to be super cheap - that rules out any wireless module/rthernet/usb and leaves us with plain RS232/485. It also needs to be small, but more importantly - light....
Monday, 2 January 2012 - 19:43
Any pointers for bitbang ASK demodulation ?
I could change the number of cycles per bit if that helps. Also, the avr won't be doing anything while receiving so I can over sample the hell out of the signal. I could use two...
Monday, 2 January 2012 - 18:52
Any pointers for bitbang ASK demodulation ?
Wires. The signal will be generated by a PC sound card though.
Monday, 2 January 2012 - 17:40
Is the interrupt the answer for this?
clawson wrote:Quote: NEVER the answer with switches ... The natural inclination for a beginner is to wire a switch direct to an external or pin change interrupt. True, that's a "...
Tuesday, 27 December 2011 - 22:08
Why use an external pull up on reset pin ?
Guess it's better safe than sorry. (And also wouldn't want to anger MR Norris). I had another thing on my mind, kind of off topic but still related to pullup/downs. I came across...
Monday, 26 December 2011 - 23:24

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