https://harryjameschapman.com Harry Chapman works across product and delivery in digital health and builds small software and hardware tools. en-gb Sun, 27 Sep 2026 16:57:48 GMT https://harryjameschapman.com/blog/balancing-an-esports-idle-game https://harryjameschapman.com/blog/balancing-an-esports-idle-game Every system in my esports idle game was in place by the morning after the first commit. Balancing its economy has taken the ten days since, mostly by letting simulated players run it for hours and reading where the money went. Play Thu, 24 Sep 2026 12:00:00 GMT https://harryjameschapman.com/blog/building-linkme-around-the-host-browser https://harryjameschapman.com/blog/building-linkme-around-the-host-browser LinkMe is a four-clue party quiz for up to 16 players. Its host's browser runs the room, which shaped how the timer, private guesses and end-of-card reveal work. Play Thu, 24 Sep 2026 12:00:00 GMT https://harryjameschapman.com/blog/building-bill-orbit https://harryjameschapman.com/blog/building-bill-orbit I built a temporary browser-based bill splitter where everyone at the table can scan a receipt, claim items and see the same totals without creating an account. Play Sun, 23 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/making-dark-souls-iii-navigable https://harryjameschapman.com/blog/making-dark-souls-iii-navigable I built a Windows minimap with breadcrumbs, bonfires and optional item markers for my sister, who cannot rely on a visual memory of a route. Play Sun, 23 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/the-best-budget-gaming-pc-is-a-used-laptop https://harryjameschapman.com/blog/the-best-budget-gaming-pc-is-a-used-laptop Somebody paid almost £3,000 for this laptop in 2023. I paid £1,150. The cheapest desktop I could build to replace it costs more than that before you plug in a monitor. Play Thu, 06 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/building-an-nhs-evidence-scraper https://harryjameschapman.com/blog/building-an-nhs-evidence-scraper The scraper I built gathers board papers, strategies and datasets from 47 mental health trusts, 42 ICBs and eight national sources. It also logs failed sources for repair. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/designing-colour-palettes-for-accessibility https://harryjameschapman.com/blog/designing-colour-palettes-for-accessibility This generator creates palettes of three to sixteen chart colours and checks each label against WCAG contrast targets. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/from-frontline-care-to-digital-health https://harryjameschapman.com/blog/from-frontline-care-to-digital-health I moved from hospital wards and NHS research into an early-stage digital health team. These are the parts of that experience I still use in product and delivery. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/frontline-insight-to-product-action https://harryjameschapman.com/blog/frontline-insight-to-product-action How I turn reports from clinicians and service users into reproducible issues that delivery and engineering can investigate. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/making-nhs-test-data-safe-by-construction https://harryjameschapman.com/blog/making-nhs-test-data-safe-by-construction I built a browser tool that creates ten-digit NHS numbers guaranteed to fail the official checksum, then explains why each one is invalid. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/modelling-the-impact-of-psychosis-relapse https://harryjameschapman.com/blog/modelling-the-impact-of-psychosis-relapse This calculator lets people change the relapse, cost and inpatient assumptions and see how each one affects the estimate. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/planning-and-picking-a-game-night https://harryjameschapman.com/blog/planning-and-picking-a-game-night I built one shared page for scheduling a game night and choosing something the group can play. It compares availability and shared game libraries, then shows how each recommendation was scored. Play Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/prototypes-as-a-way-of-thinking https://harryjameschapman.com/blog/prototypes-as-a-way-of-thinking The small tools I build when a workflow is repetitive or difficult to explain, and how I decide whether to stop or keep going. Play Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/putting-claude-on-a-round-esp32-display https://harryjameschapman.com/blog/putting-claude-on-a-round-esp32-display I adapted Anthropic's maker firmware for a 1.85-inch round ESP32-S3 display with touch controls, physical buttons and Bluetooth. Play Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/redesigning-access-to-depression-care https://harryjameschapman.com/blog/redesigning-access-to-depression-care At a specialist Mood Disorder Clinic, I built a secure self-referral route and website. After the pathway changed, referrals increased by 300% and appointment allocation fell to under seven days. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/what-live-service-data-is-for https://harryjameschapman.com/blog/what-live-service-data-is-for How I use onboarding, engagement and alert-response data to find where an NHS rollout is getting stuck and decide what to do next. Work Wed, 05 Aug 2026 12:00:00 GMT https://harryjameschapman.com/blog/why-digital-health-adoption-stalls https://harryjameschapman.com/blog/why-digital-health-adoption-stalls During NHS rollouts, clinicians supported the product but could not absorb every onboarding task. We tested a digital-navigator model for non-clinical support. Work Wed, 05 Aug 2026 12:00:00 GMT