SWLing PostBuilding an SWL Chimera
https://swling.com/blog/2025/08/building-an-swl-chimera/
#HowTo #Mods #RadioMods #SamWN5C #Si4732 #Si4732Radios #SWLChimera
Mini Radio 🕵️ Winziger Spionage Weltempfänger auf SI4732 Basis
TribesmanJohn 🇦🇺🌏👨🏼💻📷I had a tiny tiny radio arrive in the mail today, and it’s quite fun :)
https://www.vk7ben.au/2025/04/10/a-tiny-si4732-receiver/
#amateurradio #si4732 #gadgets #electronics cc:bsky
Olivier Raggi📻 Playing with the SI4732 Mini Radio firmware: I have added UTC time synchronized by RDS under the battery icon 🕰️
Mini SDR Empfänger Si4732 + ESP32
Dr. Fortyseven 🥃 █▓▒░Wrote up a quick thing to document updating the firmware on the #SI4732 "mini spy radio" on Linux.
The interface on this thing is terrible, but plenty of room for improvement. Glad to see there's an update, because it seems like a really cool little radio so far.
https://network47.org/updating-the-firmware-on-the-si4732-mini-spy-radio-on-linux/
Abhinav Krishna C K
hackaday unofficialShortwave Radio Picks up Sideband
With the push to having most of a radio receiver as part of a PC, it might seem odd to have a standalone communication receiver, but [OM0ET] reviews the latest one he picked up, an ATS25. Inside isn't much: a battery, a speaker, an encoder, and a Si4732 that provides the RF muscle.
It appears the receiver is pretty broadband which could be a problem. [OM0ET] suggests adding selectivity in the antenna or adding an extra board to use as a bandpass filter.
The design is simple enough, we are sure you could easily hack the unit to do different things. Most coverage stops at 30MHz, but there is an FM band, so we wondered if you could get the thing to work on other frequencies, too.
Clearly, the Arduino portion would be easily hackable. For the price, we were both impressed with the touchscreen and build, but maybe less impressed with the RF filtering. On the other hand, the small form factor would be great for backpacking or portable use and it isn't that expensive. It does seem to work pretty well in practice.
We've seen similar homebrew radios using the same chipset or, at least, a similar one.
#radiohacks #reviews #teardown #radio #receiver #si4732 #ssb
Radio Build Goes Outside The Box
It's easy to get caught up in a build and forget that the final version usually needs some sort of enclosure, especially things with sensitive electronics in them. The [Director of Legal Evil] at the LVL1 Louisville Hackerspace notes as much in his recent radio build. It seems as though the case was indeed an afterthought, but rather than throwing it in a nondescript black project enclosure it was decided to turn the idea of a project enclosure itself inside-out.
The radio build is based on an SI4732 radio receiver which is a fairly common radio module and is easily adaptable. It needs a microcontroller to run though, so a Maple STM32 platform was chosen to do all of the heavy lifting. The build includes a screen, some custom analog controls, and a small class D audio amplifier, but this is the point it begins to earn its name: the Chaos Radio. While playing around with the project design in CAD, a normal design seemed too bland so one was chosen which makes the radio look like the parts are exploding outward from what would have been a more traditional-style enclosure.
While the project includes a functioning radio receiver, we have to complement the creator for the interesting display style for this particular set of hardware. It can get boring designing the same project enclosures time after time, so anything to shake things up is often welcomed especially when it puts all of the radio components on display like this. In fact, it's reminiscent of some of [Dmitry]'s projects, an artist known for deconstructing various common household appliances like this CD Player.
Thanks to [Jose] for the tip!
#radiohacks #art #chaos #enclosure #maple #radio #receiver #si4732 #stm32
