@misc{conv-ttl-rs485-ohwr,
  title = {{CONV-TTLRS485 Project Page on OHWR}},
  howpublished = {\url{http://www.ohwr.org/projects/conv-ttl-rs485}}
}

@misc{ctb-repo,
  title = {{Conv TTL Blocking Repository on OHWR}},
  howpublished = {\url{http://www.ohwr.org/projects/conv-ttl-blo/repository}}
}
