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<!--Created on: 8/14/2026 1:54:57 PM-->
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  <xsd:element name="RevenueShareTerminationCap" id="uuu_RevenueShareTerminationCap" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueRetentionPercentage" id="uuu_RevenueRetentionPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueSharingObligationPercentage" id="uuu_RevenueSharingObligationPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueSharingAgreementMember" id="uuu_RevenueSharingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConvertibleDebtSecondTrancheMember" id="uuu_ConvertibleDebtSecondTrancheMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SecuritiesPurchaseAgreementMember" id="uuu_SecuritiesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ParticipationAgreementMember" id="uuu_ParticipationAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebitInstrumentOriginalDebtDiscountPercent" id="uuu_DebitInstrumentOriginalDebtDiscountPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtInstrumentDebtDefaultInterestRate" id="uuu_DebtInstrumentDebtDefaultInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfAgreementsEntered" id="uuu_NumberOfAgreementsEntered" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="InvestmentParticipationInterestPercent" id="uuu_InvestmentParticipationInterestPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AggregateInvestmentParticipationInterestCommitment" id="uuu_AggregateInvestmentParticipationInterestCommitment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="InvestmentParticipationCommitmentPaid" id="uuu_InvestmentParticipationCommitmentPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="InvestmentParticipationCommitmentPayable" id="uuu_InvestmentParticipationCommitmentPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccruedLegalAndOtherLiabilitiesCurren" id="uuu_AccruedLegalAndOtherLiabilitiesCurren" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LiquidityAndFinancialConditionAbstract" id="uuu_LiquidityAndFinancialConditionAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LiquidityAndFinancialConditionTextBlock" id="uuu_LiquidityAndFinancialConditionTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AultCapitalGroupIncMember" id="uuu_AultCapitalGroupIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfNodeLicensesTransferredAssignedAndActivated" id="uuu_NumberOfNodeLicensesTransferredAssignedAndActivated" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="PaymentsForNodeLicenses" id="uuu_PaymentsForNodeLicenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ConvertibleNotes2026Member" id="uuu_ConvertibleNotes2026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConvertibleDebtFirstTrancheMember" id="uuu_ConvertibleDebtFirstTrancheMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WorkingCapitalSurplusDeficit" id="uuu_WorkingCapitalSurplusDeficit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ReceivablesDisclosureTextBlock" id="uuu_ReceivablesDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BasisOfPresentationAndConsolidationPolicyPolicyTextBlock" id="uuu_BasisOfPresentationAndConsolidationPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NodeLicensesDigitalAssetsAndRelatedRevenuePolicyPolicyTextBlock" id="uuu_NodeLicensesDigitalAssetsAndRelatedRevenuePolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueShareAgreementPolicyPolicyTextBlock" id="uuu_RevenueShareAgreementPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NodeLicensesAndDigitalAssets" id="uuu_NodeLicensesAndDigitalAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NodeLicensesAndDigitalAssetsRevenueRecognized" id="uuu_NodeLicensesAndDigitalAssetsRevenueRecognized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ProceedsFromSaleOfTokensAndRewards" id="uuu_ProceedsFromSaleOfTokensAndRewards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RevenueShareLiability" id="uuu_RevenueShareLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueShareExpense" id="uuu_RevenueShareExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ProductsAcquiredFromEystonCompanyLtdMember" id="uuu_ProductsAcquiredFromEystonCompanyLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GfciAndVentilationFansMember" id="uuu_GfciAndVentilationFansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CustomerOneMember" id="uuu_CustomerOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CustomerTwoMember" id="uuu_CustomerTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CustomerThreeMember" id="uuu_CustomerThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CustomerFourMember" id="uuu_CustomerFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncreaseDecreaseInDeferredFinanceCost" id="uuu_IncreaseDecreaseInDeferredFinanceCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ReclassificationOfDerivativeLiabilityToAdditionalPaidInCapitalUponSettlementOfConvertibleNotes" id="uuu_ReclassificationOfDerivativeLiabilityToAdditionalPaidInCapitalUponSettlementOfConvertibleNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NodeLicensesAndAultTokensMember" id="uuu_NodeLicensesAndAultTokensMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OfficerCreditCardArrangementsMember" id="uuu_OfficerCreditCardArrangementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityOwnershipExcludingConsolidatedEntityAndEquityMethodInvesteeNumberOfSharesOwned" id="uuu_EquityOwnershipExcludingConsolidatedEntityAndEquityMethodInvesteeNumberOfSharesOwned" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TokensOrLicenseAsset" id="uuu_TokensOrLicenseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncreaseDecreaseInInventoriesAndPrepaidExpenses" id="uuu_IncreaseDecreaseInInventoriesAndPrepaidExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OfficeAndWarehouseLocatedInBaltimoreCountyMarylandMember" id="uuu_OfficeAndWarehouseLocatedInBaltimoreCountyMarylandMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OfficeSpaceInNapervilleIllinoisMember" id="uuu_OfficeSpaceInNapervilleIllinoisMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConvertibleNotes2025Member" id="uuu_ConvertibleNotes2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConvertibleNotes2025IssuedInAugustMember" id="uuu_ConvertibleNotes2025IssuedInAugustMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConvertibleNotes2025IssuedInSeptemberMember" id="uuu_ConvertibleNotes2025IssuedInSeptemberMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfClosingsInWhichDebtCanBeIssued" id="uuu_NumberOfClosingsInWhichDebtCanBeIssued" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtInstrumentPercentageOfOriginalIssueDiscount" id="uuu_DebtInstrumentPercentageOfOriginalIssueDiscount" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtInstrumentOriginalIssueDiscount" id="uuu_DebtInstrumentOriginalIssueDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtInstrumentEffectiveRateForAccretion" id="uuu_DebtInstrumentEffectiveRateForAccretion" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtInstrumentPrincipalAndInterestPayableAtMaturity" id="uuu_DebtInstrumentPrincipalAndInterestPayableAtMaturity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtConversionOriginalDebtPrincipalAmount" id="uuu_DebtConversionOriginalDebtPrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtConversionOriginalDebtAccruedInterestAmount" id="uuu_DebtConversionOriginalDebtAccruedInterestAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ConvertibleNotes2026FirstTrancheMember" id="uuu_ConvertibleNotes2026FirstTrancheMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NonQualifiedStockIncentivePlanOf2025Member" id="uuu_NonQualifiedStockIncentivePlanOf2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
