Hand-solderable 9V battery-powered 555 timer astable circuit that blinks a red LED about once per second through an on/off switch.

Hand-solderable 9V battery-powered red LED blinker using a 555 timer, on/off switch, and through-hole support components for approximately one blink per second.

Through-hole 9V battery-powered 555 timer circuit that blinks a red LED approximately once per second using an on/off switch and hand-solderable components.

Hand-solderable 9V battery powered 555 timer circuit that blinks a red LED once per second through an on/off switch.

9V battery-powered NE555 astable blinker that flashes a through-hole red LED at roughly 1 Hz through an on/off switch.

9V battery-powered NE555 astable blinker that flashes a through-hole red LED at roughly 1 Hz through an on/off switch.

9V battery-powered 1 Hz red LED blinker using a through-hole 555 astable timer, on/off switch, and hand-solderable components.

Through-hole 9V NE555 red LED blinker circuit with on/off switch

9V battery-powered 555 astable timer circuit that blinks a through-hole red LED at about 1 Hz through an on/off switch.

9V NE555 1 Hz LED Blinker (Through-Hole)

Through-hole 1 Hz red LED blinker powered by a 9V battery through an on/off switch, using an NE555 astable oscillator on a 50 mm x 50 mm 2-layer PCB.

9V battery-powered 555 timer LED blinker with on/off switch and hand-solderable through-hole parts. Uses a DIP-8 LM555 in astable mode with 47k/47k/10uF timing for about a 1 second blink interval, a 100nF decoupling capacitor, and a red 5mm LED with 680 ohm series resistor.

9V NE555 Latching Trigger to 40 ms Active-Low CD4066B Control Pulse

9V NE555 1 Hz LED Blinker (Through-Hole)

9V NE555 1 Hz LED Blinker (THT)

9V Battery 1 Hz LED Blinker Using DIP-8 NE555 (THT) with SPST Switch and Reverse-Polarity Protection

9V NE555 1 Hz LED Blinker (THT)

9V Battery-Powered 555 Timer Astable LED Blinker at 1 Hz (Through-Hole Design)

9V Battery-Powered NE555 LED Flasher with SPST Switch

9V Beam-Break Alarm Circuit Using LDR, LM393 Comparator with Hysteresis, and Adjustable Sensitivity

Through-Hole NE555 LED Blinker (1 Hz, 100 ms ON, Diode Steering, 9V Battery)

Guitar pedal starter template based on project by Mark Wu. Includes schematic and PCB layout for basic DIY pedal hardware. This includes two 1/4" jacks (one for input and one for output), a 9V power supply (including LED), a 3PDT true bypass wiring setup, and an example potentiometer that can be copy/pasted throughout the circuit. The headers are meant to be unpopulated so that wires can be soldered to the pads. PCB design rules imported from the JLCPCB 2-layer stackup template. #template

Guitar pedal starter template based on project by Mark Wu. Includes schematic and PCB layout for basic DIY pedal hardware. This includes two 1/4" jacks (one for input and one for output), a 9V power supply (including LED), a 3PDT true bypass wiring setup, and an example potentiometer that can be copy/pasted throughout the circuit. The headers are meant to be unpopulated so that wires can be soldered to the pads. PCB design rules imported from the JLCPCB 2-layer stackup template. #template

Guitar pedal starter template based on project by Mark Wu. Includes schematic and PCB layout for basic DIY pedal hardware. This includes two 1/4" jacks (one for input and one for output), a 9V power supply, a 3PDT true bypass wiring setup, and an example potentiometer that can be copy/pasted throughout the circuit. size is a good default size for a 125B enclosure. The headers are meant to be unpopulated so that wires can be soldered to the pads. PCB design rules imported from the JLCPCB 2-layer stackup template. Meant to be used with the 3PDT Breakout Board on my profile. #template

Guitar pedal starter template based on project by Mark Wu. Includes schematic and PCB layout for basic DIY pedal hardware. This includes two 1/4" jacks (one for input and one for output), a 9V power supply, a 3PDT true bypass wiring setup, and an example potentiometer that can be copy/pasted throughout the circuit. size is a good default size for a 125B enclosure. The headers are meant to be unpopulated so that wires can be soldered to the pads. PCB design rules imported from the JLCPCB 2-layer stackup template. Meant to be used with the 3PDT Breakout Board on my profile. #template