Post Created date
Colpitts and temperature change.
David, I have managed to track down the caps at DigiKey. They are a bit larger than I would like but that's the cards I'm dealt. The cost is not prohibitive for the project they...
Friday, 23 August 2013 - 20:06
Colpitts and temperature change.
Chuck, Thanks for the primer. The NPOs are already on order. I will see if these minimize the startup effect before I implement some of the other helpful tips. jj, I came up with...
Friday, 23 August 2013 - 19:04
Colpitts and temperature change.
David / Chuck, It appears that temperature is the culprit. I found a way to heat the PCB up by 5 degC. The result was another 1.5khz increase in frequency. The coil temp was not...
Friday, 23 August 2013 - 18:15
Colpitts and temperature change.
David / Chuck, The opamp is an AD825. The coil is #32 enameled magnet wire wound in a single layer over a 0.650" diameter borosilicate glass tube. The coil is 1" in length and my...
Friday, 23 August 2013 - 17:56
Frequency measurement on Attiny84.
I understand it, I just couldn't remember it. A.
Friday, 23 August 2013 - 01:01
Frequency measurement on Attiny84.
No need for a paper and pencil test, it works fine. Thanks again. A.
Thursday, 22 August 2013 - 21:05
Frequency measurement on Attiny84.
Thanks Lee, It is Lee isn't it? I wasn't sure about the math. A.
Thursday, 22 August 2013 - 19:41
How do I set clk fuses on ATTiny84 using JTAGICE mkII?
John, Like I said in the initial post, whit and help. A.
Thursday, 22 August 2013 - 18:40
How do I set clk fuses on ATTiny84 using JTAGICE mkII?
John, Bingo! Selecting the STK500 plug-in did the trick. All of the icons showed up on the menu and the programmer works as advertised. Now that the dated ( But venerable ) AS4...
Wednesday, 21 August 2013 - 11:31
How do I set clk fuses on ATTiny84 using JTAGICE mkII?
John, I have not changed any of the fuses manually. I will try what you suggest Re: AS4 and STK500 in the morning. Just wondering why the STK500 plug-in needs to load when I am...
Tuesday, 20 August 2013 - 23:08
How do I set clk fuses on ATTiny84 using JTAGICE mkII?
David / Johan, I think you will appreciate this. I moved the JTAG unit, cables and board back to a Laptop running AS4. I downgraded the firmware on the JTAG and followed the...
Tuesday, 20 August 2013 - 20:22
How do I set clk fuses on ATTiny84 using JTAGICE mkII?
David / Johan, I checked the leads, ribbon connector and connector "pod". I cannot see anything out of place. I have even taken apart the JTAG unit and made sure nothing is loose...
Tuesday, 20 August 2013 - 20:04

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