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Items tagged with: electronics

Build Your Own Drone Tracking Radar

https://www.youtube.com/watch?v=igrN_wd_g74

#electronics


Build Your Own Drone Tracking Radar: Part 1

This is the first video in a new 5 part series where I will show you how to build and program your own radar. At the end, we'll use it to locate a small dro...
YouTube
#electronics

Synthesiser switches

#electronics

#electronics

Altium team is getting desperate. Sending fake emails. No one tried to call me. #electronics
#electronics

Reworking electronics for someone else is nerve wracking enough without a MASSSSSIIIVEEEE groundplane making de-soldering that much harder. I ended up mechanically destroying the parts I removed to make their extraction more possible. Soldering in new ones takes seconds compared with the half hour to safely extract the old buggers. #electronics #rework #FixingStuff
#electronics #rework #fixingstuff

Houston, we have liftoff and are transmitting MIDI controller messages. #electronics #synth #prototyping
#electronics #synth #Prototyping

Now that the envelope control board (middle) is working properly and talking to the Nucleo (left), I'm gonna try to send some MIDI to the Raspberry Pi that runs the synth engine, and control the synth with its own hardware for the first time. #electronics #synth #prototyping
#electronics #synth #Prototyping

Arduino code for potentiometer hysteresis and conversion to MIDI values. The PCB has the pots wired the wrong way around, so that's the values are inverted. #electronics
#electronics

Bodge wire time #electronics
#electronics

I'm having a bizarre problem with this setup. I'm getting garbled data from the 4051 (analog multiplexer) but only some of the time. I can leave it working and come back and it'll have the problem.

And I just discovered that touching or even just hovering my finger over the chip affects it.

At first, I thought I had a bad connection to the Nucleo board, but I've rewired this several times now. Suspecting bad jumper wires, I soldered it this time. Didn't help.

At first glance, you'd think it's a grounding issue, but I have reflowed all my solder joints.

It's a brand new chip, but I'm beginning to suspect it's bad.

EDIT: It *might* be because I left one pin floating. I'm gonna try to ground it...

UPDATE: It appears to be because I left the pin floating and it was basically acting like a touch sensor, which would explain the completely unpredictable results.

#electronics

#electronics

I received a soldering station and some chips yesterday, so I soldered a PCB for the synthesiser. It's mostly my friend and collaborator on the project who is funding this. #electronics #synth
#electronics #synth

After combing through datasheets and Google and comparing photos to figure out the pinouts of parts and connectors we can't test yet, the keybed controller for the synthesiser now looks like this, and it's gonna be hooked up to this 61-key keybed from Fatar. #synth #electronics
#electronics #synth

The synthesiser keyboard we're building will sound like this, among other things. Yes, this will be in the production model. #synth #electronics
#electronics #synth

STM32F030 (small ARM processors) in the box they came in. Pen for scale. #electronics
#electronics

The STM32 Cube IDE is just awful. I'm told they use Keil internally at STM. They just offer this as a free option. No normal person can afford to buy Keil. It costs 3500 dollars. #electronics
#electronics

The Nucleo board lives. Had to dig out an old mini-USB cable for it. They haven't updated the design in years. Two USB generations behind! #electronics
#electronics

DigiKey order #electronics
#electronics

Envelope control PCB for the #synth just arrived from Hong Kong. #electronics
#electronics #synth

Drawing up a keyboard matrix scanner schematic for the synthesiser. This won't be a very complex circuit board.

The keyboard has 61 keys, but pretend there are 3 extra ghost keys, so it's 64. There are 8 groups of 8 keys each.

T0 thru T7 are pulsed in rapid succession by the microcontroller to pick one of the 8 keys. It reads out which groups that key is pressed in on MK0/BK0 thru MK7/BK7.

MK is make and BK is break. When a key is pushed, the MK switch closes first, followed by BK a moment later. The time gap tells you the velocity the key was struck with. No need for a pressure sensor or any analog circuitry.

#synth #electronics

#electronics #synth

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