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Germanium transistors: logic circuits in the IBM 1401 computer
| | nothinguntoward.eu
Designing a Trailing Edge Dimmer Circuit - Nothing Untoward
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| | acidbourbon.wordpress.com
a 74xx-defined radio | a c i d b o u r b o n
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| | Video Appetizer https://youtu.be/XsFSDM1pgMA TLDR I built a shortwave radio receiver from scratch using only cheap and easily available components, i.e. standard transistors, op-amps and 74xx logic chips. No typical radio parts - no coils, no variable capacitors, no exotic diodes. This project is easy to build and gives you a hands-on experience with radio technology...
| | helentronica.com
25 Mbps discrete logic transceiver for learning purposes - HELENTRONICA
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| | IntroductionPart One - the transmitterTransmitter Circuit DesignLogic family choicePRBS architectureClock source and bufferDecoupling capacitorsManchester encoding Pre-emphasisLine driverLayout Introduction I am about to build a full PHY (physical, duh) layer for data transmission that simulates the multi-Gbps transceiver circuits usually seen in high-end FPGAs and ASICs. The reason I'm doing that is to get a closer...
| | irq5.io
Setting Up a Zigbee Sensor Network « irq5.io
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| The advantage of Zigbee devices is that they are very low power, and they communicate in a wireless mesh network. The sensors are small and can work off a CR2032 coin cell for at least 2 years, maybe more. Depending on the type of sensor, they cost around US$10 and are readily available from various...