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diff --git a/2019/osmodevcon2019-osmo_small_hardware/osmo-clock-conv-v1-top.jpg b/2019/osmodevcon2019-osmo_small_hardware/osmo-clock-conv-v1-top.jpg
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diff --git a/2019/osmodevcon2019-osmo_small_hardware/osmodevcon2019-osmo_small_hardware.adoc b/2019/osmodevcon2019-osmo_small_hardware/osmodevcon2019-osmo_small_hardware.adoc
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+osmo-small-hardware.git updates
+===============================
+:author:	Harald Welte <laforge@gnumonks.org>
+:copyright:	2019 by Harald Welte (License: CC-BY-SA)
+:backend:	slidy
+:max-width:	45em
+
+
+== What is `osmo-small-hardware.git`
+
+* collection of small Open Source Hardware projects
+* started in 2016 with `osmo-mv-uart` + `mpcie-breakout`
+* expanded in 2018 with four more projects
+* all projects OSHW
+** most of them made available by sysmocom as alternative to DIY
+
+== `osmo-mv-uart`
+
+Dual USB-UART with selectable logic level voltage
+
+image::mv-uart-front.jpg[]
+
+== `osmo-mpcie-breakout`
+
+image::mpcie-breakout-v3-perspective.small.jpg[width="100%"]
+
+== `osmo-sfp-breakout`
+
+image::sfp-breakout.jpg[width="100%"]
+
+== `osmo-sfp-breakout`
+
+* expose the differential rx/tx pair as two SMA sockets each
+** can be used to transmit differential signals e.g. from FPGA differential drivers
+* give access to all auxiliary signals of a SFP(+) transceiver on a 2.54mm header
+
+== `osmo-sfp-experimenter`
+
+image::sfp-experimenter.jpg[width="100%"]
+
+== `osmo-sfp-experimenter`
+
+* like `osmo-sfp-breakout`, but
+** onboard LVDS receiver
+** onboard LVDS transmitter
+** single-ended Rx/Tx via SMA sockets
+
+
+== `osmo-sfp-experimenter`
+
+image::sfp-experimenter1.jpg[width="100%"]
+
+(thanks to Sylvain)
+
+== `osmo-clock-gen`
+
+* SI5351C software-programmable clock generator
+* ATSAMD11 microcontroller on v1
+** to be upgraded to SAMD21 on v2
+* I2C EEPROM to store register values
+* control via UART (@3.3V on 2.5mm jack) or USB
+* all eight clock outputs available as U.FL or SMA
+* 100x50 mm form-factor
+
+== `osmo-clock-gen`
+
+image::osmo-clock-gen-v1-top.jpg[width="100%"]
+
+== `osmo-clock-conv`
+
+* low phase noise, dual-output sine -> square converter
+** based on https://www.analog.com/media/en/technical-documentation/data-sheets/6957fb.pdf[LTC6957-4] chip
+** Additive jitter: 45 - 109 fS (RMS)
+** Low Skew: 3ps typical
+* 100x50 mm form-factor
+
+== `osmo-clock-conv`
+
+image::osmo-clock-conv-v1-top.jpg[width="100%"]
+
+== 100x50 mm form-factor
+
+Idea was to build several "clock blocks" in same PCB form factor
+
+* 100 mm width can be used in 3U 19" carrier for large quantity of boards:
+
+image::bgt384.jpg[]
+
+== 100x50 mm osmo-clock form-factor
+
+Idea was to build several "clock blocks" in same PCB form factor
+
+* alternatively, 1-4 boards slotted into this style of enclosure:
+
+image::tuf105_52.jpg[]
+
+
+== Further Reading
+
+* https://git.osmocom.org/osmo-small-hardware/
+* https://osmocom.org/projects/mv-uart/wiki/Wiki 
+* https://osmocom.org/projects/mpcie-breakout/wiki
+* https://osmocom.org/projects/osmo-clock-gen/wiki
+* https://osmocom.org/projects/osmo-clock-conv/wiki
+* https://osmocom.org/projects/misc-hardware/wiki/Sfp-breakout
+* https://osmocom.org/projects/misc-hardware/wiki/Sfp-experimenter
+
+== EOF
+
+End of File
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