| Schedule of related party transactions |
| | | | | | | | | | | | | | | Note Payable to | | Note Payable to | | | Steven N. Bronson | | Qualstar Corporation | | | Principal | | Interest | | Principal | | Interest | | | | | | | | | | | | | | Balance December 31, 2023 | | $ | 30,000 | | $ | 4,858 | | $ | 100,000 | | $ | 8,053 | | | | | | | | | | | | | | Additions | | | — | | | 969 | | | — | | | 3,037 | Cash Payments | | | (—) | | | (—) | | | (—) | | | (—) | Balance March 31, 2024 | | $ | 30,000 | | $ | 5,827 | | $ | 100,000 | | $ | 11,090 | | | | | | | | | | | | | | Additions | | | — | | | 1,087 | | | 10,000 | | | 3,317 | Cash Payments | | | (—) | | | (—) | | | (—) | | | (—) | Balance June 30, 2024 | | $ | 30,000 | | $ | 6,914 | | $ | 110,000 | | $ | 14,407 | | | | | | | | | | | | | | Additions | | | — | | | 1,240 | | | — | | | 3,721 | Cash Payments | | | (—) | | | (—) | | | (—) | | | (—) | Balance September 30, 2024 | | $ | 30,000 | | $ | 8,154 | | $ | 110,000 | | $ | 18,128 |
| | | | | | | | | | | | | | | Note Payable to | | Note Payable to | | | Steven N. Bronson | | Qualstar Corporation | | | Principal | | Interest | | Principal | | Interest | Balance December 31, 2024 | | $ | 30,000 | | $ | 7,313 | | $ | 110,000 | | $ | 19,176 | | | | | | | | | | | | | | Additions | | | — | | | 665 | | | 25,000 | | | 3,910 | Cash Payments | | | (—) | | | (—) | | | (—) | | | (—) | Balance March 31, 2025 | | $ | 30,000 | | $ | 7,978 | | $ | 135,000 | | $ | 23,086 | | | | | | | | | | | | | | Additions | | | — | | | 765 | | | — | | | 3,985 | Cash Payments | | | (—) | | | (—) | | | (—) | | | (—) | Balance March 31, 2025 | | $ | 30,000 | | $ | 8,743 | | $ | 135,000 | | $ | 27,071 | | | | | | | | | | | | | | Additions | | | — | | | 780 | | | 25,000 | | | 4,404 | Cash Payments | | | (—) | | | (—) | | | (—) | | | (—) | Balance September 30, 2025 | | $ | 30,000 | | $ | 9,523 | | $ | 160,000 | | $ | 31,475 |
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