VTG Calculator Chipset ~ Rare MOS MCS2525 MCS2526, NSA5140 LED Display, Working
UsedMOS✓ In Stock
$96.35
Category
Vintage Calculators
Location
Reed City, US
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Description
In good vintage shape - see photos! We tested this by hooking ground to the orange wire and +4.5v power to the brown wire. The solder joints for the switch contacts are bridged with a wire on the back of the PCB (easy to reverse) LED display is nice and crisp, just hard to photograph :) Board is marked Devtronics SR55-1-A May have been the guts to a Dev-Tronics SI-36 Calculator.
Technical Specifications
Detailed product specifications and features
BrandMOS
ModelDev-Tronics SI-36
VintageYes
MPNMCS2525
Seller Information
Seller
intergalacticmicrosystems
Feedback Score
1,229
Positive Feedback
100.0
Location
Reed City, Michigan
US
Payment Methods
OTHERWALLETCREDIT_CARD
Returns & Refunds
Returns Accepted
Return Period
Within 30 calendar day
Return Shipping
Paid by seller
Refund Method
MONEY BACK
Listing Details
StatusIN STOCK
Available1
Sold0
Listed onOctober 27, 2025
Sale typeFIXED PRICE