30 October 2023

KiCad TO-92L footprint for hand soldering

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Today I received a small batch of PCBs - THT for hand soldering - and halfway building I had to troubleshoot a short on the input Vcc line. ...
23 October 2023

Polarization of LD1115H vs CDM324

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Before popping the HLK LD1115H radars I noticed that I could get a stronger signal when the orientation of the antenna arrays between TX and...
21 October 2023

S 042 P and UAA170 from the cellar

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At a local flea market I bought a plastic drawer parts storage cabinet with 25 compartments. Drawers had unsorted components inside, mainly ...
17 October 2023

Overvoltage on HLK LD-1115H - don't

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In case you wonder how these radar modules handle overvoltage, the answer is: very bad. I gave 12V to both of my specimen while trying to un...
30 September 2023

Let's modulate the HLK-LD1115H (WBFM)

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Since the aim of all the activities on the HLK-LD1115H radar module is to come up with a simple 24 GHz transceiver, it was time to have it s...
26 September 2023

Emission of HLK-LD1115H as seen with a CDM324

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In the picture below we can witness two radar modules looking at each other. A CDM324 basic radar module was connected to an RTL-SDR to chec...
24 September 2023

Prescaler output to VO pin (HLK-LD1115H)

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Now that the prescaler has been enabled in the Hi-Sense HLK-LD1115H 24 GHz radar module, I would like to have that signal easily accessible....
21 September 2023

Enabling the prescaler on HLK-LD1115H 24 GHz radar module

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Pin labels for SRK1101A. The Hi-Sense HLK-LD1115H 24 GHz radar module uses the SGR SRK1101A as microwave active element. This nice little ch...