Friday, August 2, 2024

Home Lab On the Cheap

Computer: Raspberry Pi 4B ($50), Atomic Pi ($35), OrangePi Prime ($35)
Atomic Pi only has 2GB RAM, which limits its use; but it is PC compatible.  It is usable with a decent USB drive.  Raspberry Pi 4B is usable.  They all can run KiCad for PCB design.  Atomic Pi can run LTSpice.

Multimeters: ANENG AN8008 DMM ($20), ST213 Clamp meter ($20),  Cen-Tech/HaborFreight multimeter ($5), LCR-T4 ($6)
AN8008 gives pretty good voltage and resistor measurement but the current measurement is not reliable at high range. Cen-Tech's current measurement is good enough.  And ST213 is for high current.  LCR-T4 is also good for verifying component values and the firmware is open source.

Soldering Station: TS100 solder iron ($40 with coupon), Chandler Tools heat gun HG603D ($24), PCB Holder fixture ($4)
TS100 is pretty decent.  There is an open-source version of the firmware. It is portable with a battery pack.   I also got 3 more soldering iron tips for about $4 each: TS-KU, TS-JL02, TS-C1 in addition to TS-D24.  The 320W heat gun with two speeds works well.  The PCB holder works for small boards.  A Harbor Freight "Helping Hand" with two alligator chips and a magnifier is somewhat usable after I secured the base with a plate. 

Caliper: iGaging EZCal digital caliper ($29)
It has a nice large display and works except for the battery life.  It is relatively a little pricey.

Scale: Digital Jewelry Scale ($4)
200g range, 0.01g resolution.  It seems accurate.  Good for weighing small components.

Rotary Tools:  HarborFreight Chicago rotary tool set ($5)
This is a cheap tool, barely usable.  I power it with a variable voltage power adapter to make it somewhat usable.

Lights: Desk lamp with magnifier
It had a fluorescent lamp, but burnt out.  I installed 10 1W LEDs.  It works very well.

Hand Tools: Set of pliers, wire strippers, set of small screw drivers, nibbler, diagonal wire cutter, tweezers, 6" ruler in SAE and metric ($3 for 2), Dental picks and mirror ($6)
A Harbor Freight 16 in 1 electronic repair kit was inexpensive ($5) and usable.  A small diagonal wire cutter is very nice to have. 

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