Difference between revisions of "RadioShack 22-168"

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[[File:Rs_22_168_mugshot.png|thumb|right|RadioShack 22-168]]
{{Infobox multimeter
| image          = [[File:Rs_22_168_angle.png|180px]]
| name            = RadioShack 22-168
| status          = supported
| source_code_dir = serial-dmm
| counts          = 2000
| categories      = Unspecified
| connectivity    = RS232
| measurements    = voltage, current, resistance, capacitance, continuity, diode, logic, frequency, hFE
| features        = data hold, min/max, 10 reading memory
| website        = [http://support.radioshack.com/productinfo/DocumentResults.asp?sku_id=22-168&Name=Meters%20and%20Scopes&Reuse=N radioshack.com]
}}


The RadioShack 22-168 is a 2000 counts handheld digital multimeter with RS-232 connectivity.
The '''RadioShack 22-168''' is a 2000 counts handheld digital multimeter with RS-232 connectivity.


== Hardware ==
== Hardware ==


TODO
* '''3 1/2 digit ADC with bandgap reference''': [http://www.maxim-ic.com/datasheet/index.mvp/id/1288 Maxim MAX130CPL] ([http://datasheets.maxim-ic.com/en/ds/MAX130-MAX131.pdf datasheet]) (marking: "Maxim MAX130CPL 0138-3 C10039")
* '''CPU''': Metex KS57C2016 (Samsung KS57C2016 4-bit microcontroller with custom Metex firmware) (marking: "Metex 93D3 KS57C2016-02 410")
* '''?''': Metex 9005 (marking has ST logo: "Metex 9005 MET7ACS 92A32792BA")
* '''Crystal''': 4.1856MHz crystal
* '''555 timer''':  [http://www.intersil.com/content/intersil/en/products/timing-and-digital/counters-time-base-ics/counter-time-base-ics/ICM7555.html Intersil ICM7555CBA] ([http://www.intersil.com/content/dam/Intersil/documents/fn28/fn2867.pdf datasheet]) (marking: "H 7555 CBA L405")
* '''Quad analog switch/quad multiplexer''': [http://www.onsemi.com/PowerSolutions/product.do?id=MC14066B Motorola 14066B] ([http://www.onsemi.com/pub/Collateral/MC14066B-D.PDF datasheet]) (marking: "14066B XAC334")
* '''Quad 2-input NAND gate''': GD4011BD
* '''Optoisolator''': Lite-ON LTV-817
* '''Unidentified ICs''':  Two ICs, which appear to be SSOP8 packages are hidden behind black goo. The purpose of the goo is unknown.


== Photos ==
== Photos ==


<gallery>
<gallery>
File:Rs_22_168_angle.png|<small>Device, angle</small>
File:Rs_22_168_mugshot.png|<small>Mugshot</small>
File:Rs_22_168_mugshot.png|<small>Mugshot</small>
File:Rs_22_168_back.jpg|<small>Device, back</small>
File:Rs_22_168_metex_stand.jpg|<small>"Metex" logo on the stand</small>
File:Rs_22_168_batt_comp.jpg|<small>Battery compartment</small>
File:Rs_22_168_batt_cover.jpg|<small>Battery cover</small>
File:Rs_22_168_opened_mooning.jpg|<small>Opened up</small>
File:Rs_22_168_spare_fuse.jpg|<small>Spare fuse</small>
File:Rs_22_168_inside_mooning.jpg|<small>Front cover, PCB still mounted</small>
File:Rs_22_168_cover_front.jpg|<small>Front cover</small>
File:Rs_22_168_cover_back.jpg|<small>Rear cover</small>
File:Rs_22_168_bare_dmm.jpg|<small>Bare electronics</small>
File:Rs_22_168_sandwiched_pcb.jpg|<small>Range-switch sandwiched between PCBs</small>
File:Rs_22_168_rangeswitch.jpg|<small>Range-switch</small>
File:Rs_22_168_pcb_main_front.jpg|<small>Main PCB, front</small>
File:Rs_22_168_pcb_second_top.jpg|<small>Secondary PCB, front</small>
File:Rs_22_168_pcb_second_bottom.jpg|<small>Secondary PCB, back</small>
File:Rs_22_168_pcb_main_front_light.jpg|<small>Main PCB, front, illuminated</small>
File:Rs_22_168_pcb_main_back_light.jpg|<small>Main PCB, back, illuminated</small>
File:Rs_22_168_pcb_top_light.jpg|<small>Secondary PCB, front, illuminated</small>
File:Rs_22_168_pcb_2_bottom_light.jpg|<small>Secondary PCB, back, illuminated</small>
File:Rs_22_168_hidden_components.jpg|<small>Unidentified components protected by black coating</small>
File:Rs_22_168_ics5.jpg|<small>Metex KS57C2016 CPU</small>
File:Rs_22_168_mosc.jpg|<small>4.1856 MHz crystal</small>
File:Rs_22_168_ics3.jpg|<small>MAX130CPL ADC</small>
File:Rs_22_168_ics4.jpg|<small>Metex 9005 7ACS (ST Micro logo)</small>
File:Rs_22_168_ics1.jpg|<small>MC14066B Quad Analog Switch/Quad Multiplexer (left) and GD4011BD quad 2-input NAND gate (right)</small>
File:Rs_22_168_ics2.jpg|<small>555 Timer</small>
File:Rs_22_168_optoisolation.jpg|<small>RS-232 optoisolation</small>
File:Rs_22_168_lcd.jpg|<small>LCD display</small>
File:Rs_22_168_lcd_back.jpg|<small>LCD display, back</small>
Rs_22_168_rs232_interface_port.jpg|<small>RS-232 interface port</small>
File:Rs_22_168_cable_mated.jpg|<small>RS-232 cable, mated</small>
</gallery>
</gallery>
TODO
 
'''Cable:'''
 
See [[Device_cables#Metex_5-pin_RS232_cable]].


== Protocol ==
== Protocol ==


TODO
See [[Multimeter_ICs#Metex_14-byte_ASCII]].


== Resources ==
== Resources ==


TODO
* [https://www.radioshack.com/search/softwareResults.jsp?kw=22-168 Vendor software]
* [http://www.radioshack.com/graphics/uc/rsk/Support/SoftwareDownload/2200168.exe Software download]
* [http://www.linuxtoys.org/dvm/dvm.html linuxtoys.org: Radio Shack DMM with RS-232]


[[Category:Device]]
[[Category:Device]]
[[Category:Multimeter]]
[[Category:Multimeter]]
[[Category:Planned]]
[[Category:Supported]]

Latest revision as of 06:37, 21 March 2013

RadioShack 22-168
Rs 22 168 angle.png
Status supported
Source code serial-dmm
Counts 2000
IEC 61010-1 Unspecified
Connectivity RS232
Measurements voltage, current, resistance, capacitance, continuity, diode, logic, frequency, hFE
Features data hold, min/max, 10 reading memory
Website radioshack.com

The RadioShack 22-168 is a 2000 counts handheld digital multimeter with RS-232 connectivity.

Hardware

  • 3 1/2 digit ADC with bandgap reference: Maxim MAX130CPL (datasheet) (marking: "Maxim MAX130CPL 0138-3 C10039")
  • CPU: Metex KS57C2016 (Samsung KS57C2016 4-bit microcontroller with custom Metex firmware) (marking: "Metex 93D3 KS57C2016-02 410")
  • ?: Metex 9005 (marking has ST logo: "Metex 9005 MET7ACS 92A32792BA")
  • Crystal: 4.1856MHz crystal
  • 555 timer: Intersil ICM7555CBA (datasheet) (marking: "H 7555 CBA L405")
  • Quad analog switch/quad multiplexer: Motorola 14066B (datasheet) (marking: "14066B XAC334")
  • Quad 2-input NAND gate: GD4011BD
  • Optoisolator: Lite-ON LTV-817
  • Unidentified ICs: Two ICs, which appear to be SSOP8 packages are hidden behind black goo. The purpose of the goo is unknown.

Photos

  • Device, angle

  • Mugshot

  • Device, back

  • "Metex" logo on the stand

  • Battery compartment

  • Battery cover

  • Opened up

  • Spare fuse

  • Front cover, PCB still mounted

  • Front cover

  • Rear cover

  • Bare electronics

  • Range-switch sandwiched between PCBs

  • Range-switch

  • Main PCB, front

  • Secondary PCB, front

  • Secondary PCB, back

  • Main PCB, front, illuminated

  • Main PCB, back, illuminated

  • Secondary PCB, front, illuminated

  • Secondary PCB, back, illuminated

  • Unidentified components protected by black coating

  • Metex KS57C2016 CPU

  • 4.1856 MHz crystal

  • MAX130CPL ADC

  • Metex 9005 7ACS (ST Micro logo)

  • MC14066B Quad Analog Switch/Quad Multiplexer (left) and GD4011BD quad 2-input NAND gate (right)

  • 555 Timer

  • RS-232 optoisolation

  • LCD display

  • LCD display, back

  • RS-232 interface port

  • RS-232 cable, mated

Cable:

See Device_cables#Metex_5-pin_RS232_cable.

Protocol

See Multimeter_ICs#Metex_14-byte_ASCII.

Resources

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