NU Wireless Club - W1KBN

Northeastern University's club for amateur radio and electronics experimentation

Projects

From Tesla coils and RF kits to embedded gadgets and restoration work, here’s a look at what some of our members build with the help of the Wireless makerspace.

Submit your project: Have photos, a short description, and a brief note on what you used in the Wireless makerspace? Send them to info at nuwireless.org or message an officer on Slack and we’ll add you to the gallery.

1953 Transistor Radio Restoration

1953 Vintage transistor radio of unknown model

Restoring a 1953 transistor radio of unknown model: mapping the board layout and sourcing the antenna.

How NU Wireless helped
  • Access to soldering equipment and the circuit design skills taught in Wireless Club workshops.

Keyboard Reverse-Engineering

Air-traffic control keyboard and trackball

Reverse engineering a RADAR air-traffic control keyboard and trackball combo by analyzing its custom protocol, with the goal of building a working adapter.

How NU Wireless helped
  • Saleae logic analyzer
  • Bench power supplies

QRP Labs QMX+ Kit Build

QMX+ transceiver with toroids

Built the QMX+ multiband QRP transceiver kit from QRP Labs, hand-winding 19 toroids to make a multi-band QRP rig. It has been used extensively as an FT8 and WSPR transceiver, with upcoming support for SSB via new firmware to be tested soon.

How NU Wireless helped
  • Access to lab

DIY Curve Tracer

Handheld curve tracer with touchscreen display for transistor measurements, mounted on a Perfboard with other circuit components

A self-contained handheld transistor tester: plug in any transistor and the device uses dual DACs to sweep voltage across its terminals while applying a DC bias. The resulting current is plotted live on a small touchscreen, powered by an Arduino Pro Mini.

Built over a couple of months, with several specialty components (like the DACs and socket) directly funded by the Wireless Club budget.

How NU Wireless helped
  • Funding for critical parts (DACs, transistor socket)
  • Access to stocked components, soldering tools, and workspace
  • Lab environment for testing and refining the design

Solid State Tesla Coil

Tesla coil producing long, bright arcs

A high-frequency driver circuit pushes wall power through power transistors at ~300 kHz, producing ~100 kV and 1.5-ft arcs Built over a semester of winding coils, wiring, and assembly almost entirely in the Wireless club shack.

The arcs are low-current, so they can be touched without a severe shock (though it’s not advised!).

How NU Wireless helped
  • Wire, wood panels, tools, soldering and wiring setup, and stocked components
  • Advice from fellow members and a large knowledge base in the lab
  • Access to test equipment for circuit debugging and measurements

40-meter Woodpecker (CW transceiver)

Partially built 40-meter Woodpecker CW transceiver kit. The green circuit board is mounted in a PCB vise, with most components soldered on, including capacitors, resistors, and ICs.

The 40m Woodpecker is a low-power CW transceiver kit for the 40-meter band. It uses a direct-conversion receiver with a tunable bandpass filter, audio shaping, and muting, paired with a simple two-stage transmitter with sidetone and QSK. Output is about half a watt. This build is still in progress and is being developed to support curriculum design for Professor Farhat’s Wireless Communication Circuits course (EECE 4574).

How NU Wireless helped
  • Comfortable lab space with 24/7 access, especially useful for late-night soldering.
  • Soldering stations and tools.
  • Test equipment for circuit debugging and measurements.
  • Extra components and replacements (e.g. jumpers, capacitors) that not only filled in for a couple of missing parts but also let me go beyond the standard kit build, making the wiring and layout much cleaner.

AIR

Waterfall plot showing multiple clients sharing a channel

Part of a Cornerstone project, AIR demonstrates multiple "clients" and a "controller" communicating over a single 433 MHz channel. Off-the-shelf radio modules are paired with a custom protocol written by Vlad based on time-division multiplexing, assigning timeslots to eliminate interference between clients.

How NU Wireless helped
  • Soldering stations and test equipment (oscilloscope, function generators)
  • Misc. equipment (coax, cables, speakers, etc.)
  • Consumables (protoboards, components, wires, ferrite materials)
  • Referenced electronics books from the shack library
  • Peer discussions and troubleshooting in the lab
  • Borrowed radio modules specifically for AIR

AM Receiver (WIP)

AM receiver circuit on a custom Printed Circuit Board (PCB)

A simple diode detector AM receiver that demodulates radio into audio using a ferrite-rod antenna. It is a simple design that does not allow tuning, so the strongest local station dominates. PCB and tuning improvements are still in progress.

How NU Wireless helped
  • Soldering stations and test equipment (oscilloscope, function generators)
  • Misc. equipment (coax, cables, speakers, etc.)
  • Consumables (protoboards, components, wires, ferrite materials)
  • Referenced electronics books from the shack library
  • Peer discussions and troubleshooting in the lab

CW Transmitter

Continuous wave (CW) transmitter prototype on a Perfboard

Vlad's first project with radio! A Colpitts oscillator driving a random wire antenna with a carrier wave. The transmitter operates only while the button is pressed, allowing Morse code transmission. Despite limited frequency stability, a clear signal was received a few feet away using an SDR.

How NU Wireless helped
  • Soldering stations and test equipment (oscilloscope, function generators)
  • Misc. equipment (coax, cables, speakers, etc.)
  • Consumables (protoboards, components, wires, ferrite materials)
  • Referenced electronics books from the shack library
  • Peer discussions and troubleshooting in the lab