<p>I am particularly amused by Michael's suggestion of constructing an FM receiver where the battery powering the receiver is also the antenna.</p><p>since the typical FM receiver circuit AC couples the antenna input anyway, it might work simply by using an LDO with no high-side capacitance to power the circuit, then AC coupling to the positive terminal of the battery as the antenna input.</p><p><a href="https://mastodon.social/@mossmann/113860290728994396" target="_blank" rel="nofollow noopener noreferrer" translate="no"><span class="invisible">https://</span><span class="ellipsis">mastodon.social/@mossmann/1138</span><span class="invisible">60290728994396</span></a></p>