teardown wireless serial adapter hps-120

teardown handyware handyport hps-120 serial transceiver
download datasheet link

General Descriptions:

The HPS-120 from HandyWave is a ready-to-use short-range wireless connectivity solution for

industrial. It provides the most economic and powerful way of cable replacement for the serial

communication systems.

1.2. Key Features

 No need of external host and software

 Easy of installation and use

 Supports configuration of the local device

 Supports configuration of the remote device via Over-the-Air

 Easy of maintenance

 Supports up to 100 meter (Line of Sight)

 Supports RS-232

 Supports Point-to-Point and Point-to-Multipoint Topology

1.3. Key Specifications

 Operation Frequency: 2.4GHz ISM Band

 Transmitted Power: Max 20 / Typical 16dBm

 Received Sensitivity: More than –80dBm

 Power Supply: DC +5 ~ +12V

 Current Consumption: Up to 200mA at DC 5V

 Operation Temperature: -20 ~ 70 C

 Dimension (w/o antenna): 35mm (W) x 65mm (D) x 16mm (H)

 Baud Rate: 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, and 115.2Kbps

 Antenna Interface: SMA Female

 Signal Interface: D_SUB 9 Pin Female

The SP3222E and SP3232E series are RS-232 transceiver solutions intended for portable or hand-held applications such as notebook or palmtop computers.
The SP3222E / SP3232E series has a highefficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation.
This charge pump allows the SP3222E / SP3232E series to deliver true RS-232 performance from a single power supply ranging from 3.0V to 5.5V.
The SP3222E / SP3232E are 2-driver / 2-receiver devices.
This series is ideal for portable or hand-held applications such as notebook or palmtop computers.
The ESD tolerance of the SP3222E / SP3232E devices are over ±15kV for both Human Body Model and IEC61000-4-2 Air discharge test methods.
The SP3222E device has a low-power shutdown mode where the devices’ driver outputs and charge pumps are disabled.
During shutdown, the supply current falls to less than 1µA.

BC417143B interfaces to 8Mbit of external Flash memory. 

When used with the CSR Bluetooth software stack, it provides a fully compliant Bluetooth system to v2.0 of the specification for data and voice communications.. 

System Architecture BlueCore4-External has been designed to reduce the number of external components required which ensures production costs are minimised. 

The device incorporates auto-calibration and built in self test (BIST) routines to simplify development, type approval and production test. 

All hardware and device firmware is fully compliant with the Bluetooth v2.0 + EDR specification (all mandatory and optional features). 

To improve the performance of both Bluetooth and 802.11b/g co-located systems a wide range of co-existence features are available including two types of hardware signalling: basic activity signalling and Intel WCS activity and channel signalling

Some FCC Data (RUSHPS-120)

fix repair ebay find SG382 SRS rf signal generator and SG385 power supply

SG382 DC-2.025Ghz Stanford Research Systems

symptoms no 10Mhz at the rear output

front panel not responding

photos taken at later date but 

when i opened it for the first time it was covered

with heavy layer of soot black residue 

no scheme but there is the circuit description

which for this case was just enough

some pictures of the boards

the rear 10Mhz was fixed after replacing a faulty resistor 

R101 4.99kohm on the main motherboard
didnt have smd so i used a regular size instead 

but as long as it fixed the problem i was happy with it

the front panel was fixed after a short reflow of the spi ic's (U308, U309)

during the repair process i also accidentally shorted something

on the dc dc power supply SG385 (15V, 5V, 3.3V, -5V, -15V)

after some probing seeing half the expected voltages 

which was strange i traced the problem to LM358

which was shorting it was for the temp control 

also replaced the fan which looked tired

powering apple ipad 1st gen without battery from power supply

got a 1st gen ipad (A1337)

when i plugged it into a charger

the screen start blinking dimly 

opened it up using a flat screwdriver 

checked the battery using a multi meter

voltage was zero volts and for any battery its not good news

seeing the prices for a replaceable battery 

i decided its not worth the money to buy a new battery

and that im going to use a 5V 2A usb charger i have

so i used a cutting knife to cut around the battery carefully

cut carefully along the green line

then i de-soldered the two dead battery cells

soldered four wires to the battery pads after checking the polarity

stripes is positive (+) and solid is ground (-)

i drilled two small holes at the side of the ipad for the wires

connected two diodes to the two positive wires

in order to decrease the voltage from 5v to about 4.3v

and two resistors between the positive and the negative wires

just to keep a small load on the diodes

the ipad still needed two quick jump-starts to boot
momentary connect and disconnect the usb charger

first jump-start showed an empty battery logo 

second jump-start started the ipad

success

now i have a useless 1st gen ipad running from a usb charger

 notes:

*used both battery pads and not single to share the load of the power consumption

*could use any kind of li-ion cell batteries instead of hooking it up to ac adapter

*battery manager comparing the voltages of the left and right cells and consume more from the higher one

monochromator stepper motor upgrade

upgrading a manual monochromator to scanning monochromator
using a small piece of alu some drill holes 

some screws stepper motor and shaft adapter 

some photos

augmented microscope

the basic peppers ghost scheme (taken from wiki)

the setup

had couple of problems with this one 

mostly illumination differences between

the microscope and the lcd screen

the perspex seems to double the picture -

might be solved with tint filter or swapping the perspex 

with a thin glass beamsplitter or ar coating

resolution wise numbers was pretty clear at 800 x 600
thinking about adding a button
to act as a shutter for the screen (on/off)

the setup:
the oscilloscope is hooked through the vga port
to a small lcd display that is mounted to the peppers ghost setup
where the transparent part of the peppers ghost (perspex sheet)
is placed at the view screen of the microscope

some photos (it actually looks much better in real life)

the peppers ghost periscope


testing the setup

without tint sticker

with tint sticker

some videos (it actually looks much better in real life)

without tint sticker

using a car tint sticker (applied poorly) did the trick
and solved the double reflection of the lcd in the above video
while not disturbing the actual image when the lcd backlight was off

with tint sticker

with tint sticker

for future development i would like to try 

adding a camera and or a microphone for interactive control 

image processing (probe gesture) or sound (click sound)

or show an overlay image only when a signal is being detected 

lcd backlight triggering / oscilloscope dmm triggering follow a click sound 

maybe hooking a foot switch, eye tracking camera and so on...

augmented oscilloscope

the basic peppers ghost scheme (taken from wiki)

just an idea i had

of using peppers ghost illusion for electronics debugging

aiming a camera to the instrument that will be used
such as oscilloscope dmm or anything else
and displaying it on the transparent display

lcd screen with perspex at 45 degree angle (mirrored image)

aim the cameras to the desired instruments and display it on the screen

how it looks trough the perspex

i actually used a bigger setup (screen and perspex)

but with the same configuration

one disadvantage is that i didnt used the complete illusion setup

only one perspex so the actual image was mirrored 

some videos (looks better in real life)

for a better setup i would have use the complete peppers ghost setup

a bright screen / projector a mirror at 45 degree and a sheet of glass

and for the golden ticket use a transparent touch panel for easier control

transparent lcd mod

street find backlight  was bad so why not

only insight was that removing the anti-glare layer 

was meaningless and probably not worth the time and risk

no replacement parts

took apart

soaked with distilled water  to remove the anti-glare layer

(removing this layer is optional and not really required) 

tested against the window

added some leds around the screen