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Electronics For All (EFA)

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About EFA Community: For People around the world, who are interested in Embedded SW/HW, Electronics, Industrial Automation, Robotics, OSH, OSS, Beacons, 3D Fab,Professional N/W'ing, knowledge sharing & discussions on these technologies & engineering.34 Servers

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8 Jan 2023
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9 Jan 2023
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15 Jan 2023
@danielp3344:matrix.orgDanielIMG_20230114_191422.jpg
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01:06:17
@danielp3344:matrix.orgDanielCan anyone help me ID this component? (Small transistor looking one with center pin cut)01:06:38
@danielp3344:matrix.orgDanielThe center pin does appear to be cut on purpose because the circuit has no traces for it and it works as is01:07:39
17 Jan 2023
@perfectperfect:matrix.orgperfectperfect joined the room.16:45:27
19 Jan 2023
@berlinuxer:kde.orgberlinuxer
In reply to @danielp3344:matrix.org
Can anyone help me ID this component? (Small transistor looking one with center pin cut)
what is the function of this board? The device in the TO-92-Case could be a diode, a hallsensor, a semiconductor-fuse... A schematic would be helpful
09:42:36
@danielp3344:matrix.orgDanielIt's a starter for a high pressure sodium lamp14:17:21
@danielp3344:matrix.orgDanielI'll draw a schematic in a minute14:17:30
@danielp3344:matrix.orgDanielimage1.png
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14:25:20
@danielp3344:matrix.orgDanielAt work so appologies for the terrible phone sketch14:25:28
@danielp3344:matrix.orgDanielThe 3 dots in the middle correspond to the terminals on the board14:25:54
@danielp3344:matrix.orgDanielI included the ballast+lamp for context14:26:05
@danielp3344:matrix.orgDanielAnd I think the tan thing is an inductor but if it is it's too low value for me to easily measure, resistance is just a few ohms14:26:57
@berlinuxer:kde.orgberlinuxer I'Ve never worked with starters, neither for Neonlamps nor sodium lamps. But i guess it is a DIAC/SIDAC. digikey offers diacs in TO-92 with similar Partnumbers kxxx. 16:25:44
20 Jan 2023
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25 Jan 2023
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27 Jan 2023
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28 Jan 2023
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31 Jan 2023
@protocall7:matrix.orgprotocall7Anyone ever used OpenHantek6022? I have an Si5351 driving a 50ohm load, the scope is measuring the output as a 566 mVpp signal and calculating it as 4.9dBm, but when I run a calculator on it, I get 566mVpp into 50ohms being -1dBm. Signal levels are still quite confusing to me after reading several sources on the topic, so I'm not sure which to trust if either. Could anyone point me in the right direction here?04:08:04
@protocall7:matrix.orgprotocall7hmm, some of that may have actually been my probe loading things too. After reconfiguring it for 10x i get 760mVpp which OpenHantek calculates as 9.74dBm, but the calculator i'm using says should be 1.59dBm04:18:15
1 Feb 2023
@berlinuxer:kde.orgberlinuxer
In reply to @protocall7:matrix.org
Anyone ever used OpenHantek6022? I have an Si5351 driving a 50ohm load, the scope is measuring the output as a 566 mVpp signal and calculating it as 4.9dBm, but when I run a calculator on it, I get 566mVpp into 50ohms being -1dBm. Signal levels are still quite confusing to me after reading several sources on the topic, so I'm not sure which to trust if either. Could anyone point me in the right direction here?
Hi, i don't know what the OpenHantek is calculating, i guess its formular is for a sinewave, but your Clockgenerator outputs a rectangular wave. Maybe this is the reason for the different dBs
11:03:06
@berlinuxer:kde.orgberlinuxer Hi, i don't know what the OpenHantek is calculating, i guess its formular is for a sinewave, but your Clockgenerator outputs a rectangular wave. Maybe this is the reason for the different dBs
Sorry that i am a bit too curious. But why are you driving a 50Ohm-Load? The generators output is a LVTTL-level (0V..2,5/3,3V) so it must drive LVTTL-Input and this is afaik a high impedance-input, e.g. the CLK-Input of an µC or an CODEC/ADC or whatever.
11:06:54
@protocall7:matrix.orgprotocall7Ahh very interesting! I hadn't considered the differences in waveforms. I'll take a look at it on my TinySA and see if I can get a better idea of what it looks like in the frequency domain. I'm abusing the poor si5351 a bit and attempting to use it as a local oscillator to drive an RF mixer for a radio receiver experiment18:41:38
2 Feb 2023
@berlinuxer:kde.orgberlinuxer I see. Have in mind, that the output-impedance of the poor si5351 is 85Ohms, as the datasheet says. I can imagine that the si5351 will get hot as it has to drive more current than normal. Anyway, Good Luck for your experiments, and i am glad, that i could help you. 07:40:52
@royills:matrix.orgroyills joined the room.18:12:41

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