https://circuitbench.co.uk/tags/reference/ Recent content in Reference on CircuitBench Hugo en-gb Mon, 20 Jul 2026 00:00:00 +0000 https://circuitbench.co.uk/hc-sr04-ultrasonic-sensor-pinout-and-wiring/ Mon, 20 Jul 2026 00:00:00 +0000 https://circuitbench.co.uk/hc-sr04-ultrasonic-sensor-pinout-and-wiring/ A pinout and wiring reference for the HC-SR04 ultrasonic distance sensor. https://circuitbench.co.uk/555-timer-ic-pinout-and-how-it-works/ Sun, 19 Jul 2026 00:00:00 +0000 https://circuitbench.co.uk/555-timer-ic-pinout-and-how-it-works/ 555 timer pinout, how the internal comparators and flip-flop actually work, and the wiring mistakes that stop it oscillating. https://circuitbench.co.uk/best-electronics-textbooks-for-serious-hobbyists/ Fri, 17 Jul 2026 00:00:00 +0000 https://circuitbench.co.uk/best-electronics-textbooks-for-serious-hobbyists/ Textbook recommendations for hobbyists who want real EE theory beyond tutorials, including Bird and Stroud. https://circuitbench.co.uk/raspberry-pi-green-led-blink-codes-explained/ Thu, 16 Jul 2026 00:00:00 +0000 https://circuitbench.co.uk/raspberry-pi-green-led-blink-codes-explained/ What each flash pattern of the Raspberry Pi's green ACT LED means, from a missing bootloader file to an SDRAM failure.