I like dealing with hardware, firmware and software. From valve amp schematics and DSP algorithms to aquarium temperature and irrigation controllers, here's some of what I like to tinker with.
I'm a founder/partner at Raks Tecnologia Agrícola, where we build IoT for agriculture: soil moisture sensors and satellite/LTE communication modules for field equipment. I also do independent electronics and IoT consulting. Based in Brazil 🇧🇷
Hardware & embedded
- High-frequency and impedance-controlled PCB design
- Design and development of sensor and communication boards (IoT sensors, satellite, LTE / NB-IoT)
- Multi-channel data acquisition architectures: analog front-ends, solar/battery power, LTE store-and-forward
- Analog audio: valve amp schematics, plus DSP algorithms for audio effects
RF & antennas
- RF front-end layout and antenna integration for cellular (LTE / NB-IoT) and satellite modules
- Antenna matching networks and RF trace design (controlled-impedance feedlines, grounding, keep-outs)
Firmware & connectivity
- Firmware for STM32, ESP32 and embedded Linux targets
- Cellular IoT: AT-command modem integration, NB-IoT, eSIM (GSMA SGP.32 / IPAd) for IoT devices
Software & cloud
- Web platforms deployed on AWS: Terraform, Route 53, CloudFront, S3, EC2, RDS, Timestream
- Python tooling and TypeScript web apps, with Supabase/Postgres backends
- Integration with third-party device APIs (rate limiting, request queuing, homologation)
- Dashboards and reports for deployed device health
Business & product
- Product development from prototype to production, including outsourced electronics manufacturing management
Interested in agtech, web dev, IoT, cellular connectivity or audio electronics? Reach out on LinkedIn.