0 votes
0 answers
7 views
2 votes
2 answers
22 views
1 vote
3 answers
75 views
Low Pass Filter not having expected responseTrying to build a chebyshev low-pass RF filter to attenuate anything above 24MHz, however am not able to get a continuous drop-off in the pass band. It goes down to -20 dB and then just flattens out. ...
asked 7 hours ago0 votes
0 answers
13 views
Test ARINC 429 receiver with generatorI want to send ARINC 429 message to line receiver HI-8588. I use OWON DGE2035 as generator and Hantek 2042 as oscilloscope. CH1 sends original 32 bits message and CH2 sends same message inverted. My ...
asked 7 hours ago0 votes
0 answers
21 views
Portable USB solar panel and powerbank [closed]I've bought for travelling a solar panel with USB output to charge powerbank. Problem is that instead of charging the powerbank it's discharged into the panel. Is there some solution to prevent it and ...
asked 8 hours ago0 votes
1 answer
61 views
0 votes
3 answers
82 views
0 votes
1 answer
81 views
LM317 managing using STM32I want to manage LM317 via STM32F103C6T6 (blue pill), which must manage a LM317. I've thought that the photocoupler will be compatible with this goal, therefore I've connected the optocoupler TLP627 ...
asked 11 hours ago-2 votes
0 answers
38 views
0 votes
0 answers
28 views
Please identify connector type (H-UDI JTAG SH4)It has 7+7=14pins with 0.7mm pitch, size of 7.5x4 mm and is used in automotive multimedia systems by Harman Becker with Renesas SH7785 CPU and QNX RTOS. Supposed to be used with E10A JTAG emulator-...
asked 12 hours ago-2 votes
0 answers
37 views
0 votes
0 answers
25 views
Jitter on BMM150 3-axis sensorI'm currently evaluating the "grove - 3-axis digital compass v2.0 board" (BMM150-sensor). But I get very jittery readings (away from any magnetic objects). So I made a code that takes the ...
asked 15 hours ago0 votes
0 answers
31 views
0 votes
0 answers
49 views
How does this battery-powered CFL flashlight work?I have a pocket light that contains a CFL bulb and is powered by 3Vdc (two AA batteries in series). I have written down the schematic, but I am not sure whether the transformer windings are correct, ...
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