Reply by Phil Hobbs August 3, 20222022-08-03
Phil Hobbs wrote:
> John Larkin wrote: >> On Wed, 03 Aug 2022 11:42:45 +0200, Johann Klammer >> <klammerj@NOSPAM.a1.net> wrote: >> >>> On 08/01/2022 03:11 AM, amdx wrote: >>>> Ya, I had it for a while played with it had fun with it, I did some >>>> circuits, went out and got subcircuits, all was cool and as I recall >>>> I was >>>> trying to show how match was important to power transfer nothing >>>> major just maximum power transfer, I posted it here >>>> got a shit load of flack, was told I need to learn electronics >>>> before I try LT spice. I just said Fuck it. Haven't touched it since. >>>> Mikek >>>> >>>> >>> The thing when posting to usenset is that you should never ever read >>> any of the replies. >> >> Like the famous Signetics WOM ic, the write-only memory. >> >> 100% production yield. >> >> Of course, you won't see this. >> > > The plot of "pins remaining vs. socket insertions" is a classic in itself. >
I put it at <https://electrooptical.net/www/sed/Signetics25120WriteOnlyMemory_WOM_.pdf> for anyone who hasn't seen it. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by Phil Hobbs August 3, 20222022-08-03
John Larkin wrote:
> On Wed, 03 Aug 2022 11:42:45 +0200, Johann Klammer > <klammerj@NOSPAM.a1.net> wrote: > >> On 08/01/2022 03:11 AM, amdx wrote: >>> Ya, I had it for a while played with it had fun with it, I did some circuits, went out and got subcircuits, all was cool and as I recall I was >>> trying to show how match was important to power transfer nothing major just maximum power transfer, I posted it here >>> got a shit load of flack, was told I need to learn electronics before I try LT spice. I just said Fuck it. Haven't touched it since. >>> Mikek >>> >>> >> The thing when posting to usenset is that you should never ever read any of the replies. > > Like the famous Signetics WOM ic, the write-only memory. > > 100% production yield. > > Of course, you won't see this. >
The plot of "pins remaining vs. socket insertions" is a classic in itself. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by John Larkin August 3, 20222022-08-03
On Wed, 03 Aug 2022 11:42:45 +0200, Johann Klammer
<klammerj@NOSPAM.a1.net> wrote:

>On 08/01/2022 03:11 AM, amdx wrote: >> Ya, I had it for a while played with it had fun with it, I did some circuits, went out and got subcircuits, all was cool and as I recall I was >> trying to show how match was important to power transfer nothing major just maximum power transfer, I posted it here >> got a shit load of flack, was told I need to learn electronics before I try LT spice. I just said Fuck it. Haven't touched it since. >> Mikek >> >> >The thing when posting to usenset is that you should never ever read any of the replies.
Like the famous Signetics WOM ic, the write-only memory. 100% production yield. Of course, you won't see this.
Reply by amdx August 3, 20222022-08-03
On 8/3/2022 4:42 AM, Johann Klammer wrote:
> On 08/01/2022 03:11 AM, amdx wrote: >> Ya, I had it for a while played with it had fun with it, I did some circuits, went out and got subcircuits, all was cool and as I recall I was >> trying to show how match was important to power transfer nothing major just maximum power transfer, I posted it here >> got a shit load of flack, was told I need to learn electronics before I try LT spice. I just said Fuck it. Haven't touched it since. >> Mikek >> >> > The thing when posting to usenset is that you should never ever read any of the replies.
Yep, but still I read this. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Reply by Johann Klammer August 3, 20222022-08-03
On 08/01/2022 03:11 AM, amdx wrote:
> Ya, I had it for a while played with it had fun with it, I did some circuits, went out and got subcircuits, all was cool and as I recall I was > trying to show how match was important to power transfer nothing major just maximum power transfer, I posted it here > got a shit load of flack, was told I need to learn electronics before I try LT spice. I just said Fuck it. Haven't touched it since. > Mikek > >
The thing when posting to usenset is that you should never ever read any of the replies.
Reply by Ricky August 2, 20222022-08-02
On Tuesday, August 2, 2022 at 1:05:00 PM UTC-4, amdx wrote:
> On 8/2/2022 7:36 AM, Ricky wrote: > > On Sunday, July 31, 2022 at 8:54:55 PM UTC-4, amdx wrote: > >> On 7/31/2022 2:58 PM, jla...@highlandsniptechnology.com wrote: > >>> On Sun, 31 Jul 2022 10:56:27 -0500, amdx <am...@knology.net> wrote: > >>> > >>>> I'd like to setup a high Q LC to receive a local Radio station probably > >>>> charging a cap, when the charge is high enough flash an LED. > >>>> Maybe set the trigger point of an SCR, or could just a zener do it. I > >>>> don't have LT spice, so please don't post and answer with that. > >>>> > >>>> Thanks, Mikek > >>> I expect that a strong radio station could light an LED visibly > >>> continuously, given a good well-matched antenna. Or charge a cap and > >>> use a discharge circuit to get bright blinks. > >>> > >>> Here's my high-voltage low current blinker: > >>> > >>> https://www.dropbox.com/sh/yaqbi52vbpo6uyc/AABPAczwj1zv26-fwI4LvJyha?dl=0 > >>> > >>> But LT Spice is free, easy to learn, and a wonderful tool for stuff > >>> like this. > >>> > >> I was hoping to do it with just a coil and cap. I have some 6" coils with > >> Q over 1000. Very high impedance a resonance, so might need a lower > >> impedance pickup coil. > >> Their Litz wire, so I don't want to tap them. > > A high-Q circuit is going to be useless in this application, because you need to draw power which will spoil the Q of any high-Q circuit. The only use of a high-Q circuit would be for tuning, but with the power you are drawing off, it won't be high-Q anymore, just a tuned circuit. > > > > > Someone can LT spice that and compare a 1200 Q LC to a 200 Q LC. > Show I'm > right! Or wrong.
You might try LTspice with this file. It seems to contain descriptions for all the parts. So you won't have to learn how to incorporate models which can be a clumsy part of the job. I seem to recall, the basic parts like L and C will include a tiny bit of R by default because the simulations can go wonky when the Q is infinite. So you will need to adjust those parasitic values to set your Q. I expect you know how to do that. -- Rick C. -- Get 1,000 miles of free Supercharging -- Tesla referral code - https://ts.la/richard11209
Reply by amdx August 2, 20222022-08-02
On 8/2/2022 7:36 AM, Ricky wrote:
> On Sunday, July 31, 2022 at 8:54:55 PM UTC-4, amdx wrote: >> On 7/31/2022 2:58 PM, jla...@highlandsniptechnology.com wrote: >>> On Sun, 31 Jul 2022 10:56:27 -0500, amdx <am...@knology.net> wrote: >>> >>>> I'd like to setup a high Q LC to receive a local Radio station probably >>>> charging a cap, when the charge is high enough flash an LED. >>>> Maybe set the trigger point of an SCR, or could just a zener do it. I >>>> don't have LT spice, so please don't post and answer with that. >>>> >>>> Thanks, Mikek >>> I expect that a strong radio station could light an LED visibly >>> continuously, given a good well-matched antenna. Or charge a cap and >>> use a discharge circuit to get bright blinks. >>> >>> Here's my high-voltage low current blinker: >>> >>> https://www.dropbox.com/sh/yaqbi52vbpo6uyc/AABPAczwj1zv26-fwI4LvJyha?dl=0 >>> >>> But LT Spice is free, easy to learn, and a wonderful tool for stuff >>> like this. >>> >> I was hoping to do it with just a coil and cap. I have some 6" coils with >> Q over 1000. Very high impedance a resonance, so might need a lower >> impedance pickup coil. >> Their Litz wire, so I don't want to tap them. > A high-Q circuit is going to be useless in this application, because you need to draw power which will spoil the Q of any high-Q circuit. The only use of a high-Q circuit would be for tuning, but with the power you are drawing off, it won't be high-Q anymore, just a tuned circuit. > >
Someone can LT spice that and compare a 1200 Q LC to a 200 Q LC. Show I'm &nbsp;right!&nbsp;&nbsp;&nbsp; Or wrong. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Reply by Mike Monett August 2, 20222022-08-02
Martin Brown <'''newspam'''@nonad.co.uk> wrote:

[...]

> I vaguely recall an ancient bipolar transistor low leakage thyristor > functional equivalent that could be used to flash an LED brightly but > very slowly depending on charging of a low leakage reservoir capacitor.
> It snapped into conduction when the voltage reached about 4v.
> It was briefly in vogue for flashing them in the early red LED era just > prior to UJTs becoming common and cheap.
I vaguely recall the same thing. I tried to reconstruct it, but only got one snap and then it hung. I searched through analogspiceman's files and couldn't find anything. But it's out there somewhere. Here's my offering: Version 4 SHEET 1 1608 1700 WIRE 352 -304 304 -304 WIRE 464 -304 432 -304 WIRE 512 -304 464 -304 WIRE 608 -304 512 -304 WIRE 304 -288 304 -304 WIRE 608 -272 608 -304 WIRE 464 -240 464 -304 WIRE 304 -192 304 -208 WIRE 608 -192 608 -208 WIRE 400 -112 400 -192 WIRE 464 -64 464 -144 WIRE 400 0 400 -16 FLAG 304 -192 0 FLAG 400 0 0 FLAG 608 -192 0 FLAG 512 -304 Q2E SYMBOL voltage 304 -304 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL npn 464 -112 M0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL pnp 400 -144 M180 WINDOW 0 43 35 Left 2 WINDOW 3 39 62 Left 2 SYMATTR InstName Q2 SYMATTR Value 2N3906 SYMBOL res 448 -320 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 10k SYMBOL cap 592 -272 R0 SYMATTR InstName C1 SYMATTR Value 1uf TEXT 376 -424 Left 2 ;'2N3904/06 SCR TEXT 376 -392 Left 2 !.tran 0 10m 0 TEXT 576 -392 Left 2 !.options plotwinsize=0 -- MRM
Reply by August 2, 20222022-08-02
On Tue, 02 Aug 2022 15:11:10 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:

>> On Sunday, July 31, 2022 at 9:12:02 PM UTC-4, amdx wrote: >>> On 7/31/2022 7:35 PM, boB wrote: >>>> On Mon, 01 Aug 2022 03:13:19 +0300, Klaus Kragelund >>>> <klau...@hotmail.com> wrote: >>>> >>>>> 31.07.22 22:58, jla...@highlandsniptechnology.com wrote: >>>>>> On Sun, 31 Jul 2022 10:56:27 -0500, amdx <am...@knology.net> wrote: >>>>>> >>>>>>> I'd like to setup a high Q LC to receive a local Radio station probably >>>>>>> charging a cap, when the charge is high enough flash an LED. >>>>>>> Maybe set the trigger point of an SCR, or could just a zener do it. I >>>>>>> don't have LT spice, so please don't post and answer with that. >>>>>>> >>>>>>> Thanks, Mikek >>>>>> I expect that a strong radio station could light an LED visibly >>>>>> continuously, given a good well-matched antenna. Or charge a cap and >>>>>> use a discharge circuit to get bright blinks. >>>>>> >>>>>> Here's my high-voltage low current blinker: >>>>>> >>>>>> https://www.dropbox.com/sh/yaqbi52vbpo6uyc/AABPAczwj1zv26-fwI4LvJyha?dl=0 >>>>>> >>>>>> But LT Spice is free, easy to learn, and a wonderful tool for stuff >>>>>> like this. >>>>>> >>>>> Tuned LC with diode to big low leakage cap >>>>> >>>>> Then a BJT multivibrator, can operate in nA >>>>> Assign very low duty cycle for LED >>>> >>>> Yes, I was thinking an L-C circuit to boost the voltage at least. >>>> >>>> LTspice can be downloaded for free from www.analog.com >>>> >>>> I suggest you get it. >>>> >>>> boB >>>> >>> Ya, I had it for a while played with it had fun with it, I did some >>> circuits, went out and got subcircuits, all was cool and as I recall I was >>> trying to show how match was important to power transfer nothing major >>> just maximum power transfer, I posted it here >>> got a shit load of flack, was told I need to learn electronics before I >>> try LT spice. I just said Fuck it. Haven't touched it since. > >It's a bit of a pity that you let the opinions of others deprive you >of a useful tool. Spice has its quirks, but it can help a lot, once >you get the hang of it.
I have got people started on LT Spice, entering and running a basic circuit, in 5 minutes. I often use it instead of a calculator, for simple stuff like voltage dividers and rc circuits. Unlike a calculator, it leaves a record.
> >Don't try to use it to simulate complete complex circuits.
Not entire products, but pretty hairy subsystems. https://www.dropbox.com/s/dv9qiy2z3x2bxhk/P942_18.jpg?raw=1 As Mike said, the main function of Spice is to train your instincts.
Reply by Jeroen Belleman August 2, 20222022-08-02
> On Sunday, July 31, 2022 at 9:12:02 PM UTC-4, amdx wrote: >> On 7/31/2022 7:35 PM, boB wrote: >>> On Mon, 01 Aug 2022 03:13:19 +0300, Klaus Kragelund >>> <klau...@hotmail.com> wrote: >>> >>>> 31.07.22 22:58, jla...@highlandsniptechnology.com wrote: >>>>> On Sun, 31 Jul 2022 10:56:27 -0500, amdx <am...@knology.net> wrote: >>>>> >>>>>> I'd like to setup a high Q LC to receive a local Radio station probably >>>>>> charging a cap, when the charge is high enough flash an LED. >>>>>> Maybe set the trigger point of an SCR, or could just a zener do it. I >>>>>> don't have LT spice, so please don't post and answer with that. >>>>>> >>>>>> Thanks, Mikek >>>>> I expect that a strong radio station could light an LED visibly >>>>> continuously, given a good well-matched antenna. Or charge a cap and >>>>> use a discharge circuit to get bright blinks. >>>>> >>>>> Here's my high-voltage low current blinker: >>>>> >>>>> https://www.dropbox.com/sh/yaqbi52vbpo6uyc/AABPAczwj1zv26-fwI4LvJyha?dl=0 >>>>> >>>>> But LT Spice is free, easy to learn, and a wonderful tool for stuff >>>>> like this. >>>>> >>>> Tuned LC with diode to big low leakage cap >>>> >>>> Then a BJT multivibrator, can operate in nA >>>> Assign very low duty cycle for LED >>> >>> Yes, I was thinking an L-C circuit to boost the voltage at least. >>> >>> LTspice can be downloaded for free from www.analog.com >>> >>> I suggest you get it. >>> >>> boB >>> >> Ya, I had it for a while played with it had fun with it, I did some >> circuits, went out and got subcircuits, all was cool and as I recall I was >> trying to show how match was important to power transfer nothing major >> just maximum power transfer, I posted it here >> got a shit load of flack, was told I need to learn electronics before I >> try LT spice. I just said Fuck it. Haven't touched it since.
It's a bit of a pity that you let the opinions of others deprive you of a useful tool. Spice has its quirks, but it can help a lot, once you get the hang of it. Don't try to use it to simulate complete complex circuits. Jeroen Belleman