Delptronics ThunderBell - Manual (Page 3)

ThunderBell Mini Kit Instructions
Page 3 of 10
1N4148 Diode (±)
Diodes are red and black glass cylinders. There are four diodes, and they all look similar, but D2 is different. D2 is a
switching diode
and has “1N4148” printed on it in very small type. An easier way to tell D2 apart is that D2 is loose,
while the other three diodes are connected together on a piece of tape.
Diodes are polarized, so it is important that the right lead goes in the right hole. When inserted into the PCB, the
black stripe on the diode must line up with the stripe on the part outline on the PCB. The diode leads need to be bent
into a U shape in order to insert them into the PCB. Bend the leads by holding the diode body and pressing down on
each lead close to the body.
Schottky Diodes (±)
D1, D3, and D4 are Schottky diodes and have “BAT85” printed on it in very small type. When inserted into the PCB,
the black stripe on the diode must line up with the stripe on the part outline on the PCB.
Resistors
Resistors are cylindrical parts with colored stripes indicating their value. The resistor leads need to be bent into a U
shape in order to insert them into the PCB. Bend the leads by holding the resistor body and pressing down on each
lead close to the body.
Quantity Description Marking Refdes
3 1K Resistor brown black black brown brown R10, R11, R14
1 10K Resistor brown black black red brown R9
1 22K Resistor red red black red brown R12
2 47K Resistor yellow violet black red brown R4, R13
1 100K Resistor brown black black orange brown R1
1 220K Resistor red red black orange brown R2
2 470K Resistor yellow violet black orange brown R3, R5
1 1M Resistor brown black black yellow brown R6
2 2.2M Resistor red red black yellow brown R7, R8
Ceramic Capacitors
Ceramic capacitors are very small tan or blue blobs. Their value is marked on them with a three digit code. The
marking is rather small, so you may have to use a magnifying glass to read them.
Quantity Description Marking Refdes
2 0.01 µF Ceramic Capacitor 103 C6, C7
1 0.1 µF Ceramic Capacitor 104 C3
1 0.68 µF Ceramic Capacitor 684 C5
1 1 µF Ceramic Capacitor 105 C4