| kit | pricing | transistor voltage | complexity | notes |
|---|---|---|---|---|
| original Keyall | - | 500 | simple | discontinued |
| Keyall HV | $14 | 500 | simple | updated version of original Keyall |
| Keyall HV | $15.50 | 1000 | simple | updated version of original Keyall with higher voltage transistor option |
| Keyall HV | $16.50 | 1000 | simple | with socket for PVI (IC), updated version of original Keyall with higher voltage transistor option |
| Keyall Discrete | $14 | 500 | complex | old board version, Discrete refers to separate parts rather than using an integrated circuit (IC) |
| Keyall Discrete | $15.50 | 1000 | complex | old board version, Discrete refers to separate parts rather than using an integrated circuit (IC) |
| Keyall Discrete | $15.50 | 500 | complex | latest board version, Discrete refers to separate parts rather than using an integrated circuit (IC) |
| Keyall Discrete | $17 | 1000 | complex | latest board version, Discrete refers to separate parts rather than using an integrated circuit (IC) |
| SMT Keyall Discrete | $14 | 500 | complex & SMT | latest Keyall kit: a Surface Mount Technology (SMT) version of Keyall Discrete |