FanLamp

How it fits together

FanLamp, part by part

Scroll or tap a part. Press “See the 3D CAD design” to watch the model, built from our CAD, light each part up and show how it connects.

See the 3D CAD designShow the concept

Real-time 3D render · drag to rotate · final design may varySwipe sideways to rotate

1. 01

   The whole FanLamp

   A blue lamp on an arm behind the sprayer boom strobes and photographs every spray fan, telling the cab phone which nozzle is plugged.

2. 02Brain

   Raspberry Pi Zero 2 W

   The brain: it runs the fanlamp program

3. 

   03

   Camera Module 3

   Looks along the boom and sees every spray fan

   Raspberry Pi Zero 2 W · CSI-2 ribbon cable · Camera frames

4. 

   04

   Blue LEDs (x2)

   Light the spray fans and strobe for each exposure

   Raspberry Pi Zero 2 W · Constant-current driver · 1 A pulsed LED power

5. 05

   LED driver

   Sets LED current and flashes it on the Pi's command

   Raspberry Pi Zero 2 W · GPIO pin (PWM input) · Strobe pulses

6. 06

   5 V regulator

   Turns the sprayer's 12 V into 5 V for the Pi

   Raspberry Pi Zero 2 W · 5 V power lead · 5 V power

7. 07

   All connected

   5 key parts, one program, and your phone

The idea

The blue boom light you spray by at night, made to check every fan along the boom and name the plugged nozzle

How the parts connect

FanLamp, wired up

Every part, what links it to the brain, and how the data reaches your phone. A solid line is a cable; a dashed line is a radio link.

The program

What controls FanLamp

while True:
    strobe.on()                          # GPIO PWM to the LED driver
    lit = picam2.capture_array()         # 1 ms exposure
    strobe.off()
    dark = picam2.capture_array()        # background, LEDs off
    diff = cv2.absdiff(lit, dark)
    fans = measure_fans(diff, columns)   # width and brightness per nozzle
    for n, fan in fans.items():
        state = judge(fan, neighbours(fans, n), history[n])
        bad[n] = bad[n] + 1 if state != 'OK' else 0
        if bad[n] >= 2:
            alerts.push(n, state, lit)   # shown on the cab page
    time.sleep(3)

To your phone

How the data reaches FanLamp cab page

Cab phone or tablet browser

1. FanLamp
2. Wi-Fi · local web page
3. Cab phone

Key specs

Targets for production units; they may change during development.

Pricing

Target pricing. Parts cost about $136 per lamp at qty 1 and about $70 at qty 500 (est.); a 24 m boom needs 2 lamps. Not for sale yet.

Indicative launch pricing in USD, excluding taxes and shipping. Final pricing is confirmed before any balance is charged.

1. 28 Oct 2026, 16:25LatestA farmer or custom applicator spraying at night with an 18 to 36 m boom needs to know the moment one nozzle plugs; the cab rate display hides one plugged tip in 48, and a per-nozzle flow kit starts near $1,583 before sensors (TeeJet Sentry listing, sources in DESIGN.md).

   • Drawn idea plan (idea.json): a trailed sprayer with a 24 m boom in a wheat field at night from above, with the tractor and cab, the fans along the boom, the sprayed crop behind and the strip missed by nozzle 17; pins for the left and right lamps on their arms and the operator's phone
   • The product picture is now this drawn plan instead of the plain fallback card; drawn from the rev A design notes, not the CAD
   • What we kept from the CAD geometry work: each lamp sits 1.5 m behind the nozzle line and 1 m across the centre line, so one pair checks every fan on a 24 m boom
   • Next: drawn plans for more catalogue products that still show the fallback card

   See it in 3DFull research and design

2. 25 Oct 2026, 22:18Per-nozzle flow monitors cost thousands for a full boom and only alarm at about a 20% flow drop → one camera checks every fan's shape, and the CAD report shows it sees a 3% width loss at 9 m and 9% at 15 m (est.)

   • New design: 3 printed parts in code CAD, bought parts fit-checked
   • Market research, hardware list and use case written up
   • Design page and kit render published
   • Product page added

   See it in 3DFull research and design