plus and minus relative to ground, you'd just use ground as your reference, but here we need to produce a ground of our own. That's quite common in single rail circuits. By fooling the differential amplifier into thinking that's whe...
(BFO) circuit. It’s not the greatest design, it might even be the worst, but it could be built with the parts on hand and sometimes that’s all that matters. After packing a 2N3904 transistor, an LM386 amplifier, and every Hackaday reader’s favorite chip the 555 timer into an ...
and secondly the internet is full of crappy transmitter circuits. Designing a stable FM transmitter circuit is rather a difficult job, many calculations are involved their. There are also some construction error and component
High Output Capacity (15A/400W):Strong power handling with a continuous current of 15A and a power capacity of 400W. Timer For 11 40|Seta Timer For 12 30|Wide Voltage Input (5 ~ 36V):Versatile compatibility with a wide voltage range, ensuring this module can power various devices. ...
Here is a 60 minute countdown timer that can be used as an exposure timer for UV light boxes, photography, egg timer, and many other projects where counting or delay is necessary. The heart of the countdown timer is PIC16F84A chip and 4 digit character LED display. The relay is energi...