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I've got a Delco/GM Radio I'd like to wire up an use in my shop. I found a connector but it does NOT come with instructions to tell one which wire goes here, to what or from what. As well they have pig tail leads to every one of 24 pins and my most basic radio (DELCO PN 15766185 CI: DCSL SER MAN 3 *89DCSLM222735248*) likely uses just those to power, illumination and speakers. The vendor selling the correct connector for twenty dollars writes " Identification of the wires in your vehicle, as well as pin location of those wires in the plug, will be up to you. Yes, research will be required and it may be challenging. GM did not use the same wires for all the vehicles that had this plug, so we cannot provide one plug that is going to have easy-to-determine wire functions for all vehicles. " So, my question "Does anyone know how/where I might be able to get the pin out for the connector on this radio?" Preferably at no cost :) -- G.T. -- G.T.

What exactly are you trying to see? There has been a lot of interesting discussions on how to "safely" connect an oscilloscope to the AC Mains. So, what is your goal? What are you trying to see on the AC? What is your AC Mains voltage? Is there a safety/protective ground? What is your skill set? College electronics class? High school electronics class? Self taught by trail and error? What is your age? That fits in with what is your skill set. This isn't intended to be insulting, I was playing by shock and learn before formal education, a vocational school program that today grants Associate Degrees, then I worked for 2+ years before I was tricked into starting college for a BS in electrical engineering. Many (?most?) of the people in this group have similar informal education, followed by some form of formal training. We can offer advice for problems and goals we've all had but they are probably worthless to your goals. I repeat, if all you want to do is look at the 50/60Hz Mains waveform, why? There is nothing interesting about a 50/60Hz 'sinewave.' If all you want to do is to see an AC Mains waveform. I'll capture the 120V 60Hz AC Mains in our home with a PC sound card and my 9k:1k attenutator and post 60 seconds of 48K high resolution wav audio in the files section. My 9k:1K attenuator came from a project at work, I kept it and rebuilt it in a Budd minibox with a standard IEC C14 male connector with a female 1/4" stereo audio connector. Note: This is never used for RF, only for AF and has been used about 5 times in the last 30 years. I keep it because it might be useful...someday. This is a link to the his oscilloscope https://files.owon.com.cn/probook/HDS200_series_user_manual.pdf I traded for a Zoyi ZT-701s, very similar to your unit. Zoyi multimeter+oscilloscopes - ZT-70xS, It is a two channel 'scope ' and works fine with my 9k:1k attenuator on the AC. But you can still fry your self if you aren't careful. Or https://onlinetonegenerator.com/ The waveform will be so close to the AC mains you probably can't tell the difference. The only real difference will be AC Mains will have various distortion components that a pure waveform won't have, but you'll have extreme difficulty seeing the distortion on a scope, you'll need to feed the AC Mains to a PC sound card. Sample at 96K minimum, higher if possible, and do a high resolution FFT. And connecting the AC to a PC is a good way to fry a PC, PC inputs can not handle more then perhaps 3V peak to peak. And this is a whole new set of problems and nightmares.

It was more of an example where to find additional information. As you have "12 Delco/GM Auto Radio", it is perfectly understandable that people are going to search for radios that came out of General Motors vehicles (auto radio). Not happy with CAN bus discussion? I CAN appreciate that, so will change title of this post to reflect what you are seeking / desire. You specify that only thing that matters is finding diagram for "DELCO PN 15766185". Challenge accepted. I will do everything for you, you will merely have to click on the links, maybe copy/Paste to follow along. Duckduckgo.com -> search terms "Used DELCO 15766185 Radio" And I get: https://www.ebay.com/itm/326060942245 This is important because it lists a donor vehicle, and the RPO: "OEM Radio Opt Umr FROM 03 2003 CHEVY SILVERADO 15766185" 2003 Chevy Pickup, RPO code is UMR Seller is a salvage yard. They are experts on interchange. In Full Description, there are at least 2 vehicles that have same RPO code. Again, that is "UMR" in case you missed it. Interchange vehicles are 2012 GMC Canyon and 2012 Chevrolet Colorado. The both use UMR, other vehicles use UM7, and are typically older models. Let's run with the 12s (see what I did there?). Duckduckgo.com -> search terms "2012 Canyon UMR radio diagram" and found somebody in same situation, asking for. "Need a stock radio wiring diagram. Please help!" located at https://www.355nation.net/threads/need-a-stock-radio-wiring-diagram-please-help.57585/ A bit down the page, Shawn5800 kindly posts a schematic of the radio connector located at https://www.355nation.net/attachments/sound-systems-pdf.38809/ But you want a pinout, and understandably so, since you were very specific in your OP title / subject. At bottom of the thread, somebody else was looking for a 2012 Wiring Diagram. Since was a subject in audio portion of Colorado / Canyon website, I followed it. On that thread, there is a link " https://www.naskie18.com/colorado/schematics/ " Thinking it held some desirable nuggets of information, I followed it just to find its a dead link. But, I CAN try and resurrect it at archive.org: archive.org -> Search Terms " https://www.naskie18.com/colorado/schematics/ " and chose a date that corresponded with peak traffic. That led me to: https://web.archive.org/web/20171110065203/https://www.naskie18.com/colorado/schematics/ but nothing available, missing Dara or not ceawled. Re-searched again: Duckduckgo.com -> Search terms "DELCO PN 15766185 pin out" and hit first result " http://tehnomagazin.com/Auto-radio-car-connector/DELCO-Car-Radio-Wiring-Connector.htm " And lo & behold, pin out for 24 pin radio connector AND for the 12pin connector as well. BONUS! To keep going, I searched Amazon for OEM Radio Harnesses (not posting link as may contain personal information and is around 400 characters long). Saw Metra in results, remembered using them in past. Eventually drilled down to the Metra 70-2006 harness. Not available, and they don't know when will be... But I have part number. Metra 70-2006. Duckduckgo.com -> Metra 70-2006 manual Lo and Behold, I found the manual @ Crutchfield! https://pdf.crutchfieldonline.com/ImageBank/v20111030154300/Manuals/120/120702006.PDF That's odd. There are some differences between it, TechnMagazin. But, there are some differences. Probably features and stuff, I don't know. Maybe different country. Something for you to figure out. Maybe it's the difference between UMR and UM7. Back to what I am supposed to be working on: what caused the cpu in a German plc on a krv traction container to blow out, before I risk blowing the replacement. Looks like water intrusion but have to.... sorry. Forgot this thread was all about "Pin Out Required for 12 Delco/GM Auto Radio Without Mentioning ANYTHING ELSE!!! And do it for me ( Please?)". 15min break is over, back to work. (Drops the mic) ~SD

Hello,I am trying to build a driver for my YIG shown below. I have made a AC and time domain plots. I know that in feedback theory i need 0dB gain and phase shift of 180 degrees. How can i see this oscilation condition in my AC plot? I dont have even 0dB in the plot. In the AC plots https://eu.mouser.com/datasheet/2/609/AD8033_8034-1502231.pdf sesitivity: 450 KHz/mA 3dB bandwidth 2.2MHz resistance 2Ohm inductance 1.5uH /g/electronics101/files/john233/classA_driver.asc /g/electronics101/files/john233/classA_driver_AC.asc /g/electronics101/photo/296358/3866354?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3866353?p=Created%2C%2C%2C20%2C2%2C0%2C0

Also one other effect. Simple full wave rectifiers cause symmetrical peak clipping. The rectifiers recharge on the peak of the voltage waveform to replace the charge drawn out on the average of the power supply output. Hence a lot of PCs such as in a business environment can be a big EMI generator due to the peak clipping. On 12/14/2024 5:21 PM, Charles R Patton via groups.io wrote:

I am very happy today! We passed an extended TUV ISO-13485 inspection for the “Design and manufacturing of medical equipment”. There is an incredible amount of detailed paperwork to keep track of and to prove that the designs are safe and meet FDA requirements. I will sleep well tonight. Bertho

This is way complicated interface but appears to be intrinsically safe and "idiot proof." I consider all of us to be idiots at the worst possible moment so please don't take it as an insult. https://www.rtl-sdr.com/grid-2-audio-analyzing-the-mains-electrical-grid-waveform-with-a-pc-soundcard/

Found this... https://www.researchgate.net/publication/226513535_Input_protection_for_the_laboratory_computer/link/02e7e53c429694ff65000000/download?_tp=eyJjb250ZXh0Ijp7ImZpcnN0UGFnZSI6InB1YmxpY2F0aW9uIiwicGFnZSI6InB1YmxpY2F0aW9uIn19 These are suitable for a lot of applications PC to PA Systems Interface This web page shows PA to PC interface and PC to PA interface "PA" can be many different devices, everything from a radio to tape deck. A serious PC audio interface...really serious but very good. https://sound-au.com/project154.htm And a rather specialized computer I/O system, well worth a read even if you don't built it. https://sound-au.com/project232.htm Note the distortion generator.....sort of neat to be able to add X% distortion to a signal.

i have the st-link v2 st cube programer and a 64k bluepill board,does anyone know if i can flash a bootloader to enable programing over its usb port using arduino ide?.

Hello, I have built a PLL system based on the article attached. In the scope photos we see the IF signal of the mixer. When the servo amplifier is ON as shown in photo 3 then the error signal ripple is much much smaller then photo 5. but the VCO keeps moving decreasing the frequency. So ripple wise the amplifier is good but the DC shift is not getting fix. My only spec is getting a lock on the resonant frequency of the resonator shown in the diagram below. We drive the FM coil of the YIG for VCO functionality. My YIG(VCO) FM coil has the following carachteristics: sensitivity 400(Khz/mA) 3dB BW 2MHz resistance 1ohm inductance 1.5uH How can I see what kind of PID needed in my situation? What do you think the PID needs to be to lock in resonant frequency? /g/electronics101/photo/296358/3865523?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3865522?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3865521?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3865520?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3865519?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/files/john233/High_spectral_purity_microwave_oscillator_design_using_conventional_air-dielectric_cavity%20%284%29.pdf

One major problem with using GM tubes for radiation monitoring is they can overload and either go dead or produce an extremely low count, much below normal background. Scintalation counters can experience this too but only in intense, several thousand rad, radiation fields. That's why ion chambers have a place in the grand scheme of things. The GM counters in the physics lab had what might be called a missing pulse detector. Say background is 30 counts per minute, the missing pulse detector produced an alarm if a count/pulse was missing for more then 20 seconds. The effect is known by several names, it was called 'dead time' in our lab. Modern tubes have better self quenching and are less likely to experience this. It is a major concern with pre ~1980ish surplus GM tubes.

One of the members of our shortwave club lives in a small condo where space is a premium. He found this article and it works better then I'd have expected. https://www.stufinnis.co.uk/workbench.html The workbench fits on a kitchen table but could probably be used with similar tables. And forget common card tables, they are way too flimsy. I used one as my work bench when I was 12 and one afternoon a leg buckled and it was a mess. I was too busy dodging the hot soldering iron. Obviously you have to change the British AC outlets for American ones if you are in America, other nations will require similar adjustments. I'd add a 'ground fault interrupter' or " "residual current device" at the workbench. A GFI has saved my rump several times. Take the part on isolation transformer equaling added safety with a large hunk of salt. Is An Isolation Transformer A Safety Measure Or Death Trap? https://sound-au.com/articles/iso-xfmr.htm And Variacs, variable AC power transformer, have some important issues. https://sound-au.com/articles/variac.htm Failure to place a fuse in the secondary of the Variac, a fuse in the hot/primary won't protect the secondary from an overload. I use a super fast magnetic breaker in series with a conventional fuse in the secondary.

The new transistors are oscillating at about 1GHz, the frequency is frequency modulated by the incoming audio! The cure was a ferrite bead on the base and collector (now that's a first for me) and a 10pF SMD capacitor between base and emitter. I grabbed my Tiny SA on a wild hunch, found a spike and borrowed a Signal Hound USB spectrum analyzer to confirm the oscillation. The semiconductor industry constantly "improves" their products. Original 1N4004 switch slow enough to be a minimal EMI source, modern 1N4004 switch fast enough to be EMI sources from hell. The silicon is purer, the junction is thinner and the turn off time is a lot faster. Someday really soon I hope to post a simple test device to see how much commutation noise a diode produces.

MOTOROLA Model H18UCH9PW7AN 700/800 MHz Question: Can two of these units be used as 'walkie-talkies' around the house/homestead/farm without a license or a 'repeater etc?' https://www.govdeals.com/asset/481/4948 -- G.T.

You should not delete a message (or an entire thread) just because you say it is off-topic, while at the same time saying that it is on-topic and appropriate. If it was really worth posting here in the first place, it should remain. Did we not read a while back that you would not deleting your messages? How's that going? Frankly, I am tired of this nonsense. Andy

Hello , I have built a PLL system based on the following article. I have designed the amplifier to have some input voltage current output behavior. but in the lab I sat that when i plug the the input I get oscilations at the output. what could cause the situation? 3d PDF Layout and lab photos are attached. Thanks. /g/electronics101/files/john233/High_spectral_purity_microwave_oscillator_design_using_conventional_air-dielectric_cavity%20%284%29.pdf /g/electronics101/photo/296358/3862595?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3862596?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3862597?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3862598?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3862599?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3862600?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3862601?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/files/john233/layout_new_amp_updated3.pdf

I've been dragooned to help a friend I've known since the second grade. Jimmy designs and builds ultra high end audio systems, he builds everything up to the speakers. Recently he's ran into some odd problems where "identical" transistors behave differently in high end audio. He purchases directly from the manufacturer so the chances of counterfeits is pretty low. It's been a life time [1968~1973] since I designed any serious audio amps. I realized my talents lay elsewhere and it was a better value to trade money for decent amps then spend nearly unlimited hours to obtain similar results. Note: I do not consider myself an audiophile, I damaged my hearing riding a motorcycle for 35 years and had tinnitus as a young child. Sooo, I'm refamiliarizing myself with the issues of high end audio design, theory and reality. No amplifier is perfect, they all have artifacts. One thing that is very different today from way back when is moderate priced USB audio I/O 'cards' allow meaningful FFT analysis that actually matches reality, within limits. I downloaded this book to start with.... Bob Metzler - Audio Measurement Handbook https://convexoptimization.com/TOOLS/Metzler.pdf While copyrighted it appears in quiet a few respectable locations, I'm guessing the author has waived copyright issues. Rod Elliot of ESP audio has quite a few articles on design and measurement of distortion. https://sound-au.com/articles/distortion.htm https://sound-au.com/articles/intermodulation.htm#ref https://sound-au.com/articles/intermodulation.htm https://sound-au.com/project52.htm Uses a sound card to measure distortion https://sound-au.com/project232.htm Perhaps the single most useful trick shown by Mr. Elliot is his "distortion adder." It allows sanity checks, which, when dealing with audio distortion is necessary. It is way too easy ending up chasing your tail like a puppy or kitten. That's why I gave up on amplifier design in 1973. A quasi-comp Sansui AU-555A sounded much better then my best efforts at about 1/2 the cost in material and 1/gazillionth the wasted time. I could have collected sodapop bottle along the highway, turned them in for the deposit and been time ahead. I'd reached a point where I'd lost confidence in my ability to measure differences in slight design variations. One important issue, I've been playing with several USB sound cards for several years and realizee "The 5V power rail in most USB systems simply suck!" Modify your USB cable and add your own 5V power supply. I went with a LM7805 with the standard design with an added 1uF tantalum (I hate and distrust tantalums but they have the best filtering capacity for size and a 100uF and 1000uF on the 5V out. I'm not convinced the added capacitors were worthwhile but the PCB I used had the pads for them so I decided to toss them in. [Be certain to tie your 5V power supply V-/ground to PC USB V-/ground! I spent an hour late one night wondering "Why doesn't this damn thing work!"] The residual noise floor was just under 10dB lower with the external supply versus the laptop USB 5V power. You mileage will vary because every maker of USB almost certainly has different noise issues.. I suspect Jimmy is running into the hard wall of physics, where each device is inherently different even if made at the same time. This is something I have no idea how to verify. They don't call it the bleeding edge of technology for nothing. Oh, and don't bother trying to test the modulator in your SSB/AM/FM ham rig, they all suck.

Found a few low voltage isolated buck converters on Amazon, 12/24vdc in, 12/5vdc out. While I could make those work, the cost is high. I need something that is able to deliver 12vdc, at least 100w. Best solution I have found is: Orion-Tr 12/12-9 (110 W) Orion-Tr 12/24-5 (120 W) Both offer 200v 'galvanic' isolation (vs intrinsic?) and should work. Cost is higher at $64 ea, with needed qty of 4. Ultimately the outputs will be connected to individual LFP cells that are already connected 4s. Basically Top charging. Haven't been able to use 'traditional' LFP batteries as I would be pulling ~180A short burst intermittently. Basically is 2nd Battery used only for starting an engine. Current solution is using 12vdc to 120vdc converter, and feeding to an isolated smps that is rated for DC on AC inputs. Repeat 4 times. Lots of underhood space used. While above is very doable, a 500w inverter feeding power supply then LFP single cell chargers through isolation transformers should work as well. Or find isolated versions of the LFP cell chargers. Anyone have suggestions on isolated converters, or isolated single cell LFP charger? My searches at Amazon, Digikey, Mouser, Allied have been kind of dismal. And in case you are wondering: Yes, this abomination would comprise several loads switched by latching relays. ~SD

hi all,i have just ordered one of these counters,are they any good for radio alignment lo and if stages et? https://www.aliexpress.com/item/1005007393827258.html?spm=a2g0o.order_list.order_list_main.5.21ef1802ekk16Shttps://www.aliexpress.com/item/1005007393827258.html?spm=a2g0o.order_list.order_list_main.5.21ef1802ekk16S

Hi all, I have just brought this psu,https://www.ebay.co.uk/itm/186801000648 its o-30v 0-1a,its made of discrete components with no ic's, its transfo has a center tap then +50v,+40v/-50v+-40v taps with a seperate 6.3v winding , the main voltage pot is a 1k with just the center and one outer leg used,its 1k at max volts,would it be possible to mod this for say 2amps and 70 ish volts output? would anyone have any ideas ie schematics etc,or an explanation of its circcuit topolagy,it has a wirewound resistor of 1 ohm,i assume that is a current sense resistor,i have uploaded some pics of it in the photos section called my psu,cheers in advance 73 Paul de m3vuv.